As filed with the Securities and Exchange Commission on April 5, 2002.

                                    This Registration Statement also constitutes
         Post-Effective Amendment No. 1 to Registration Statement No. 333-51885.

                                                    Registration No. 333-_______
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                -----------------
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933


                                                               
UNISYS CORPORATION                            Delaware               38-0387840
UNISYS CAPITAL TRUST I                        Delaware               04-3626139
UNISYS CAPITAL TRUST II                       Delaware               04-3626145
(Exact Name of Registrant as         (State of Incorporation)        (I.R.S. Employer Identification No.)
Specified in Its Charter)


                                   Unisys Way
                          Blue Bell, Pennsylvania 19424
                                 (215) 986-4011
    (Address, Including Zip Code, and Telephone Number, Including Area Code,
                  of Registrant's Principal Executive Offices)

                              Nancy Straus Sundheim
              Senior Vice President, General Counsel and Secretary
                               Unisys Corporation
                                  Unisys Way
                          Blue Bell, Pennsylvania 19424
                                 (215) 986-4008
       (Name, Address, Including Zip Code, and Telephone Number, Including
                        Area Code, of Agent For Service)

                                    Copy to:
                              Rise B. Norman, Esq.
                           Simpson Thacher & Bartlett
                              425 Lexington Avenue
                            New York, New York 10017

      Approximate date of commencement of proposed sale to the public: From time
to time after the effective date of this registration statement.

      If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

      If any of the securities being registered on this form are to be offered
on a delayed or continuous basis pursuant to Rule 415 under the Securities Act
of 1933 other than securities offered only in connection with dividend or
interest reinvestment plans, check the following box. [X]

      If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ] _______________

      If this form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ] _______________

      If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]
================================================================================

                         CALCULATION OF REGISTRATION FEE



                                                                    PROPOSED MAXIMUM
                                                                         AGGREGATE          PROPOSED MAXIMUM      AMOUNT OF
            TITLE OF EACH CLASS OF                  AMOUNT TO BE       OFFERING PRICE      AGGREGATE OFFERING    REGISTRATION
         SECURITIES TO BE REGISTERED               REGISTERED (1)   PER SECURITY (1) (2)   PRICE (1) (3) (4)         FEE
---------------------------------------------     ----------------  --------------------   ------------------    -------------
                                                                                                     
Debt Securities of Unisys Corporation (5)

Common Stock, par value $.01 per share, of
   Unisys Corporation (6) (7)

Preferred Stock, par value $1.00 per share,
   of Unisys Corporation (8)

Warrants of Unisys Corporation (9)

Stock Purchase Contracts of Unisys
   Corporation (10)

Stock Purchase Units (11)

Guarantees of Unisys Corporation of the Trust
   Preferred Securities of the Trusts (12)

Trust Preferred Securities of Unisys Capital
   Trust I (13)

Trust Preferred Securities of Unisys Capital
   Trust II (13)

             Total..........................       $1,350,000,000                             $1,350,000,000         $124,200

-----------------

(1)   Pursuant to General Instruction II.D of Form S-3, the amount to be
      registered, proposed maximum offering price per security and proposed
      maximum aggregate offering price have been omitted for each class of
      securities registered hereunder.

(2)   The proposed maximum aggregate offering price per security will be
      determined from time to time by the relevant registrant in connection with
      the issuance by that registrant of the securities registered hereunder.

(3)   The proposed maximum aggregate offering price has been estimated solely
      for purposes of calculating the registration fee pursuant to Rule 457(o)
      under the Securities Act of 1933 and reflects the maximum offering price
      of securities issued, rather than the principal amount of securities that
      may be issued at a discount and shall not exceed $1,350,000,000 or the
      equivalent thereof, based on the exchange rate on the applicable offering
      date, in one or more currencies or currency units identified by the
      applicable registrant at the time of offering.

(4)   Excluding accrued interest, distributions and dividends, if any.

(5)   An indeterminate number of debt securities of Unisys Corporation are
      covered by this registration statement. Debt securities may be issued (a)
      separately, (b) as part of stock purchase units that are registered hereby
      or (c) upon exercise of warrants to purchase debt securities that are
      registered hereby.

(6)   An indeterminate number of shares of common stock of Unisys Corporation
      are covered by this registration statement. Common stock may be issued (a)
      separately, (b) upon the conversion of either the debt securities or the
      shares of preferred stock of Unisys Corporation, each of which is
      registered hereby, (c) upon settlement of stock purchase contracts of
      Unisys Corporation or stock purchase units, each of which is registered
      hereby or (d) upon exercise of warrants to purchase common stock that are
      registered hereby. Shares of common stock issued upon conversion of debt
      securities or preferred stock will be issued without the payment of
      additional consideration.

(7)   Includes an indeterminate number of rights to purchase Junior
      Participating Preferred Stock of Unisys Corporation (the "Rights"). The
      Rights trade with the common stock of Unisys Corporation and prior to the
      occurrence of certain events, the Rights will not be exercisable or
      evidenced separately from shares of common stock of Unisys Corporation.
      The value, if any, attributable to the Rights is reflected in the market
      price of the common stock.

(8)   An indeterminate number of shares of preferred stock of Unisys Corporation
      are covered by this registration statement. Preferred stock may be issued
      (a) separately, (b) as part of stock purchase units that are registered
      hereby or (c) upon exercise of warrants to purchase preferred stock that
      are registered hereby.

(9)   An indeterminate number of warrants, representing rights to purchase debt
      securities, common stock or preferred stock of Unisys Corporation, each of
      which is registered hereby, are covered by this registration statement.

(10)  An indeterminate number of stock purchase contracts of Unisys Corporation
      are covered by this registration statement. Each stock purchase contract
      may be issued separately or as part of a stock purchase unit. A stock
      purchase contract obligates the holder, upon settlement, to purchase an
      indeterminate number of shares of common stock of Unisys Corporation or
      other securities. If a stock purchase contract is issued as part of a
      stock purchase unit, no separate consideration will be received for the
      stock purchase contract.

(11)  An indeterminate number of stock purchase units are covered by this
      registration statement. Each stock purchase unit consists of (a) a stock
      purchase contract, under which the holder, upon settlement, will purchase
      an indeterminate number of shares of common stock of Unisys Corporation or
      other securities and (b) a debt security of Unisys Corporation, a share of
      preferred stock of Unisys Corporation, a trust preferred security of a
      Trust (as defined below) or a debt obligation of a third party, including
      a U.S. Treasury security.

(12)  Includes all obligations of Unisys Corporation with respect to the Trusts
      and the trust preferred securities registered hereunder, and the rights of
      the holders of the trust preferred securities with respect thereto. No
      separate consideration will be received for any Guarantee or any other
      such obligations.

(13)  An indeterminate number of trust preferred securities of Unisys Capital
      Trust I and Unisys Capital Trust II (each, a "Trust") are covered by this
      registration statement. Trust preferred securities may be issued
      separately or as part of stock purchase units that are registered hereby.

                                  ------------

      THE REGISTRANTS HEREBY AMEND THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANTS
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(a), MAY DETERMINE.

                                  ------------

      PURSUANT TO RULE 429 UNDER THE SECURITIES ACT OF 1933, THE PROSPECTUS
CONTAINED IN THIS REGISTRATION STATEMENT IS A COMBINED PROSPECTUS AND RELATES TO
SECURITIES REGISTERED UNDER THIS REGISTRATION STATEMENT AS WELL AS $150,000,000
OF SECURITIES PREVIOUSLY REGISTERED AND REMAINING UNSOLD UNDER THE REGISTRATION
STATEMENT OF UNISYS CORPORATION ON FORM S-3 (NO. 333-51885). THIS REGISTRATION
STATEMENT ALSO CONSTITUTES POST-EFFECTIVE AMENDMENT NO. 1 TO SUCH REGISTRATION
STATEMENT ON FORM S-3 (NO. 333-51885), WHICH AMENDMENT SHALL BECOME EFFECTIVE
CONCURRENTLY WITH THE EFFECTIVENESS OF THIS REGISTRATION STATEMENT. IF
SECURITIES PREVIOUSLY REGISTERED UNDER THAT PREVIOUS REGISTRATION STATEMENT ARE
OFFERED AND SOLD BEFORE THE EFFECTIVE DATE OF THIS REGISTRATION STATEMENT, THE
AMOUNT OF PREVIOUSLY REGISTERED SECURITIES SO SOLD WILL NOT BE INCLUDED IN THE
PROSPECTUS HEREUNDER.

                                  ------------

      THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. WE
MAY NOT SELL THESE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO SELL THESE SECURITIES AND IT IS NOT SOLICITING AN OFFER TO BUY THESE
SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.

                   SUBJECT TO COMPLETION, DATED APRIL 5, 2002

                                   PROSPECTUS

                                 $1,500,000,000

                               UNISYS CORPORATION
                                 Debt Securities
                                  Common Stock
                                 Preferred Stock
                                    Warrants
                            Stock Purchase Contracts
                              Stock Purchase Units
                                   Guarantees

                             UNISYS CAPITAL TRUST I
                             UNISYS CAPITAL TRUST II
                           Trust Preferred Securities
                                  Guaranteed by
                               Unisys Corporation

                                  ------------

      We will provide the specific terms of the securities in supplements to
this prospectus. You should read this prospectus and the related supplement
carefully before you invest.

      Our common stock is listed on the New York Stock Exchange under the symbol
"UIS."

      BEFORE YOU INVEST, YOU SHOULD CONSIDER CAREFULLY THE RISK FACTORS
BEGINNING ON PAGE 1.

      NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE
ADEQUACY OR ACCURACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

                                  ------------

                               Unisys Corporation
                                   Unisys Way

                               Blue Bell, PA 19424

                                 (215) 986-4011

                    This prospectus is dated _________, 2002.

                                TABLE OF CONTENTS

                                                                           
ABOUT THIS PROSPECTUS .....................................................    1

RISK FACTORS ..............................................................    1

SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS ................................    5

ABOUT UNISYS ..............................................................    5

ABOUT THE TRUSTS ..........................................................    6

USE OF PROCEEDS ...........................................................    6

RATIOS OF EARNINGS TO FIXED CHARGES AND EARNINGS TO COMBINED
FIXED CHARGES AND PREFERRED STOCK DIVIDENDS ...............................    6

DESCRIPTION OF DEBT SECURITIES ............................................    7

DESCRIPTION OF CAPITAL STOCK ..............................................   15

DESCRIPTION OF WARRANTS ...................................................   19

DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS ..........   20

DESCRIPTION OF TRUST PREFERRED SECURITIES .................................   21

DESCRIPTION OF TRUST PREFERRED SECURITIES GUARANTEES ......................   22

EFFECT OF OBLIGATIONS UNDER THE
SUBORDINATED DEBT SECURITIES AND THE GUARANTEES ...........................   25

PLAN OF DISTRIBUTION ......................................................   26

LEGAL MATTERS .............................................................   28

EXPERTS ...................................................................   28

WHERE YOU CAN FIND MORE INFORMATION .......................................   28



                                        i

                              ABOUT THIS PROSPECTUS

      This prospectus is part of a registration statement that we filed with the
SEC using a shelf registration process. Under this shelf process, we may sell
any combination of the securities described in this prospectus in one or more
offerings up to a total dollar amount of $1,500,000,000. This prospectus
provides you with a general description of the securities we may offer. Each
time we sell securities, we will provide a prospectus supplement that will
contain specific information about the terms of that offering. The prospectus
supplement may also add, update or change information contained in this
prospectus.

      You should rely only on the information contained or incorporated by
reference in this prospectus and any applicable prospectus supplement. We have
not authorized anyone to provide you with different information. We are not
making offers to sell the securities in any jurisdiction where an offer or
solicitation is not permitted. The information in this prospectus is accurate
only as of the date on the front cover. You should not assume that the
information contained in this prospectus is accurate as of any other date. You
should read both this prospectus and any prospectus supplement together with the
additional information we incorporate by reference under the heading "Where You
Can Find More Information".

                                  RISK FACTORS

         In addition to the other information contained and incorporated in this
prospectus, you should consider carefully the following factors before deciding
to purchase any of the securities.

OUR BUSINESS IS AFFECTED BY CHANGES IN GENERAL ECONOMIC AND BUSINESS CONDITIONS.

         Our business is affected by changes in general economic and business
conditions. It also could be affected by acts of war, terrorism or natural
disasters. During 2001, we faced a very challenging economic environment,
compounded by the terrorist attacks of September 11. In this environment, many
organizations delayed planned purchases of information technology products and
services. For us, this was particularly the case in several key markets that we
serve: airlines and travel, financial services and communications, with the
impact most pronounced for us in high-end enterprise servers and in systems
integration and consulting projects. If the level of demand for our products and
services does not increase or if it declines in the future, our business could
be adversely affected.

WE FACE AGGRESSIVE COMPETITION IN THE INFORMATION SERVICES AND TECHNOLOGY
MARKETPLACE.

         The information services and technology markets in which we operate
include a large number of companies vying for customers and market share both
domestically and internationally. Our competitors include:

         -        computer hardware manufacturers;

         -        software providers;

         -        systems integrators;

         -        consulting and other professional services firms;

         -        outsourcing providers; and

         -        network services providers.

         Some of our competitors may develop competing products and services
that offer better price-performance or that reach the market in advance of our
offerings. Some of our competitors also have or may develop greater financial
and other resources than we have, with enhanced ability to compete for market
share generally, in some instances through significant economic incentives to
secure contracts. Some may also be better able to compete for skilled
professionals. Any of this could have an adverse effect on our business. Our
future results will depend on our ability to mitigate the effects of aggressive
competition on our revenues, pricing and margins and on our ability to attract
and retain talented people.

WE FACE VOLATILITY AND RAPID TECHNOLOGICAL CHANGE IN OUR INDUSTRY.

         We operate in a highly volatile industry characterized by rapid
technological change, evolving technology standards, short product life cycles
and continually changing customer demand patterns. Our success will depend, in
part, on our ability to anticipate and respond to these market trends and to
design, develop, introduce, deliver or obtain new and innovative products and
services on a timely and cost-effective basis. We may not be successful in
anticipating or responding to changes in technology, industry standards or
customer preferences, and the market may not demand or accept our services and
product offerings. In addition, products and services developed by our
competitors may make our offerings less competitive.


                                       1

OUR FUTURE RESULTS WILL DEPEND ON OUR ABILITY TO GROW PROFITABLY IN OUR SERVICES
BUSINESS.

         In particular, we will need to:

         -        Accelerate growth in outsourcing and managed services - Our
                  outsourcing contracts are multi-year engagements under which
                  we take over management of a client's technology operations,
                  business processes or networks. We will need to maintain a
                  strong financial position in order to grow our outsourcing
                  business. In a number of these arrangements, we hire certain
                  of our clients' employees and may become responsible for the
                  related employee obligations, such as pension and severance
                  commitments. In addition, system development activity on
                  outsourcing contracts may require us to make significant
                  up-front investments. As long-term relationships, these
                  outsourcing contracts provide us a base of recurring revenue.
                  However, in the early phases of these contracts, gross margins
                  may be lower than in later years when the work force and
                  facilities have been rationalized for efficient operations and
                  an integrated systems solution has been implemented.

         -        Drive profitable growth in systems integration and consulting
                  - Our systems integration and consulting business has been
                  adversely affected by the recent economic slowdown. In this
                  economic environment, customers have been delaying systems
                  integration projects. Our ability to grow profitably in this
                  business will depend in part on an improvement in economic
                  conditions and a pick-up in demand for systems integration
                  projects. It will also depend on the success of the actions we
                  have taken to enhance the skills base and management team in
                  this business and to refocus the business on integrating
                  best-of-breed, standards-based solutions to solve client
                  needs. In addition, profit margins in this business are
                  largely a function of the rates we are able to charge for our
                  services and the chargeability of our professionals. If we are
                  not able to maintain the rates we charge or appropriate
                  chargeability for our professionals, our profit margins will
                  suffer. The rates we are able to charge for our services are
                  affected by a number of factors, including: our clients'
                  perception of our ability to add value through our services;
                  introduction of new services or products by us or our
                  competitors; pricing policies of our competitors; and general
                  economic conditions. Chargeability is also affected by a
                  number of factors, including: our ability to transition
                  employees from completed projects to new engagements; and our
                  ability to forecast demand for our services and thereby
                  maintain an appropriate head count.

OUR FUTURE RESULTS WILL DEPEND ON MARKET ACCEPTANCE OF OUR HIGH-END ENTERPRISE
SERVERS.

         In our technology business, we are focusing our resources on high-end
enterprise servers based on our Cellular MultiProcessing (CMP) architecture. Our
CMP servers are designed to provide mainframe-class capabilities with compelling
price-performance by making use of standards-based technologies such as Intel
chips and Microsoft operating system software. In recent months we have
transitioned both our legacy ClearPath servers and our Intel-based ES7000s to
the CMP platform, creating a common platform for all the company's high-end
server lines. Our future results will depend, in part, on customer acceptance of
our new CMP-based ClearPath Plus systems and our ability to maintain our
installed base for ClearPath, which continues to provide the majority of
operating profit in the company's technology business. In addition, our future
results will depend, in part, on our ability to generate new customers and
accelerate sales of the lower-margin Intel-based ES7000 line. The company
believes there is significant growth potential in the developing market for
high-end Intel-based servers running Microsoft operating system software.
However, competition in this new market is likely to intensify in coming years,
and our ability to succeed will depend on our ability to compete effectively
against enterprise server competitors with more substantial resources and on our
ability to achieve market acceptance of the ES7000 technology by clients,
systems integrators, and independent software vendors.

OUR CONTRACTS MAY NOT BE AS PROFITABLE OR PROVIDE THE LEVEL OF REVENUES THAT WE
EXPECT.

         A number of our long-term contracts for network services, outsourcing,
help desk and similar services do not provide for minimum transaction volumes.
As a result, revenue levels are not guaranteed.

                                       2

In addition, some of these contracts may permit termination or may impose other
penalties if we do not meet the performance levels specified in the contracts.

         Some of our systems integration contracts are fixed-price contracts
under which we assume the risk for the delivery of the contracted services and
products at an agreed-upon fixed price. At times we have experienced problems in
performing some of these fixed-price contracts on a profitable basis and have
provided periodically for adjustments to the estimated cost to complete them.
Our future results will depend on our ability to perform these services
contracts profitably.

         We frequently enter into contracts with governmental entities. Risks
and uncertainties associated with these government contracts include the
availability of appropriated funds and contractual provisions that allow
governmental entities to terminate agreements at their discretion before the end
of their terms.

WE MAY FACE DAMAGE TO OUR REPUTATION OR LEGAL LIABILITY IF OUR CLIENTS ARE NOT
SATISFIED WITH OUR SERVICES OR PRODUCTS.

         The success of our business is dependent on strong, long-term client
relationships and on our reputation for responsiveness and quality. As a result,
if a client is not satisfied with our services or products, our reputation could
be damaged and our business adversely affected. In addition, if we fail to meet
our contractual obligations, we could be subject to legal liability, which could
adversely affect our business, operating results and financial condition.

OUR FUTURE RESULTS WILL DEPEND IN PART ON THE PERFORMANCE AND CAPABILITIES OF
THIRD PARTIES.

         We have commercial relationships with suppliers, channel partners and
other parties that have complementary products, services or skills. Our future
results will depend in part on the performance and capabilities of these third
parties, on the ability of external suppliers to deliver components at
reasonable prices and in a timely manner, and on the financial condition of, and
our relationship with, distributors and other indirect channel partners.

WE ARE SUBJECT TO THE RISKS OF DOING BUSINESS INTERNATIONALLY.

         We derive approximately 57% of our total revenue from international
operations. Due to our foreign operations, we are exposed to the effects of
foreign currency exchange rate fluctuations on the U.S. dollar. We use foreign
exchange forward contracts and foreign exchange options to manage our exposure
to market risks from changes in foreign currency exchange rates.

         In addition to fluctuations in foreign currency exchange rates, many
other factors beyond our control could affect our international business. These
include:

         -        changes in political or economic conditions;

         -        trade protection measures;

         -        import or export licensing requirements;

         -        the burdens of complying with a variety of foreign laws and
                  regulations;

         -        multiple and possibly overlapping and conflicting tax laws;
                  and

         -        weaker intellectual property protections in some
                  jurisdictions.


                                       3

OUR SERVICES OR PRODUCTS MAY INFRINGE UPON THE INTELLECTUAL PROPERTY RIGHTS OF
OTHERS.

         We cannot be sure that our services and products do not infringe on the
intellectual property rights of third parties, and we may have infringement
claims asserted against us or against our clients. These claims could cost us
money or prevent us from offering some services or products. Historically in our
contracts, we have generally agreed to indemnify our clients for any expenses or
liabilities resulting from claimed infringements of the intellectual property
rights of third parties. In some instances, the amount of these indemnities may
be greater than the revenues we receive from the client. Any claims or
litigation in this area, whether we ultimately win or lose, could be
time-consuming and costly, injure our reputation or require us to enter into
royalty or licensing arrangements.

WE INCURRED CHARGES IN THE FOURTH QUARTERS OF 2000 AND 2001.

         Given the weak economic environment and the rapidly changing market for
information technology products and services, we took actions in the fourth
quarters of each of 2000 and 2001 to reduce our cost structure and to refocus
our resources on higher-growth businesses and products. As a result:

         -        In the fourth quarter of 2000, we took a pre-tax charge of
                  $127.6 million, primarily for a work-force reduction. After
                  the charge and an extraordinary item, we reported net income
                  of $225.0 million for the full year.

         -        In the fourth quarter of 2001, we took a pre-tax charge of
                  $276.3 million, primarily for a work-force reduction. After
                  this charge and an extraordinary item, we reported a net loss
                  of $67.1 million for the full year.

We could incur charges and/or experience losses in the future.

                                       4

                   SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS

      This prospectus contains and incorporates by reference statements that do
not directly or exclusively relate to historical facts. These types of
statements are forward-looking statements within the meaning of the Private
Securities Litigation Reform Act of 1995. You can often identify forward-looking
statements by the use of words such as "may," "could," "project," "believe,"
"anticipate," "expect," "estimate," "continue," "potential," "plan" and
"forecast." Forward-looking statements rely on assumptions and are subject to
risks, uncertainties and other factors that could cause our actual results to
differ materially from the expectations suggested or implied by these
forward-looking statements. You should read and interpret forward-looking
statements together with the following, which describe these assumptions, risks,
uncertainties, and other factors:

      -     the risk factors contained in this prospectus under the caption
            "Risk Factors";

      -     our most recent Annual Report on Form 10-K under the heading
            "Management's Discussion and Analysis of Financial Condition and
            Results of Operations";

      -     our Quarterly Reports on Form 10-Q; and

      -     our other SEC filings.

      Any forward-looking statement speaks only as of the date on which that
statement is made. We will not update any forward-looking statement to reflect
events or circumstances that occur after the date on which the statement is
made.

                                  ABOUT UNISYS

      We are a worldwide information services and technology company providing
business solutions that help customers use information technology to seize
opportunities, overcome challenges and succeed in the global economy. We have
two business segments -- services and technology -- and we provide services and
technology to commercial businesses and governments throughout most of the
world.

      -     Services Segment -- In the services segment, we provide a range of
            services and solutions designed to help clients apply information
            technology to meet their business needs. Our portfolio of solutions
            and services includes consulting and systems integration;
            outsourcing, including the management of a customer's internal
            information systems and management of specific business processes,
            such as payment processing, mortgage administration and cargo
            management; network services involving the management and support of
            customers' multi-vendor networks, desktops and servers; and security
            solutions to protect systems, networks, applications and data.

      -     Technology Segment -- In the technology segment, we develop servers
            and related products that operate in high-volume, mission-critical
            environments. Major offerings include enterprise-class servers based
            on our Cellular MultiProcessing architecture, such as the ClearPath
            Enterprise server, which integrates proprietary and "open"
            platforms, and Intel-based servers with enterprise-class attributes,
            such as the ES7000 server; system middleware to power high-end
            servers; storage products; payment systems; and specialized
            technologies.

      The primary vertical markets we serve worldwide include financial
services, communications, transportation, media, commercial and public sector,
including the U.S. federal government.

      Products and services are marketed primarily through a direct sales force.
In certain foreign countries, we market primarily through distributors.

      No single customer accounts for more than 10% of our consolidated revenue.
Sales of commercial products to various agencies of the U.S. government
represented 10% of total consolidated revenue in 2001.


                                       5

      The principal executive offices of Unisys are located at Unisys Way, Blue
Bell, Pennsylvania 19424. Our telephone number is (215) 986-4011.

                                ABOUT THE TRUSTS

      Each of the trusts is a Delaware business trust governed by a declaration
of trust, which may be amended and restated from time to time, among the
trustees of each trust and Unisys Corporation, as sponsor of the trusts. From
time to time, the trusts may issue preferred securities and invest the proceeds
in subordinated debt securities issued by Unisys. Each time a trust offers its
trust preferred securities, it will provide the terms of those securities and
related matters in a prospectus supplement.

      Unisys will directly or indirectly own all of the common securities of
each of the trusts. The common securities will rank equally with, and each trust
will make payments on the common securities of that trust in proportion to, the
corresponding trust preferred securities, except that if an event of default
occurs under the applicable declaration of trust, our rights as holder of the
common securities to payments will be subordinated to your rights as holder of
the applicable preferred securities. We will, directly or indirectly, hold
common securities in an aggregate liquidation amount equal to 3% of the total
capital of each of the trusts, or such other amount stated in the applicable
prospectus supplement.

      Each trust will initially have four trustees. Three of them, referred to
as regular or administrative trustees, are officers or employees of Unisys. The
fourth, referred to as the Delaware trustee, is HSBC Bank & Trust Company
(Delaware), National Association, which has its principal place of business in
the State of Delaware. Prior to the issuance of any trust preferred securities,
we will appoint an additional trustee, referred to as the property trustee or
the institutional trustee, to act as property trustee for purposes of the Trust
Indenture Act of 1939. The property trustee will be HSBC Bank USA or another
financial institution that is not an affiliate of Unisys. Unisys, as holder of
the common securities, is entitled to appoint, remove or replace any of, or
increase or decrease the number of, the trustees of each of the trusts.

      The rights of the holders of the trust preferred securities of a trust,
including economic rights, rights to information and voting rights, and the
duties and obligations of the trustees of a trust, will be contained in and
governed by the declaration of that trust, as it may be amended and restated
from time to time, the Delaware Business Trust Act and the Trust Indenture Act
of 1939.

      We will pay all of the trusts' fees and expenses, including those relating
to any offering of preferred securities. In addition, we guarantee payments on
the preferred securities to the extent the trusts can themselves make payments
on the preferred securities.

      The office of the Delaware trustee for each trust is 1201 Market Street,
Suite 1001, Wilmington, Delaware 19801. Each trust's principal place of business
is 15 Atlantic Avenue, Ocean View, Delaware 19970.

                                 USE OF PROCEEDS

      Unless we indicate otherwise in a prospectus supplement, we plan to use
the net proceeds from the sale of the securities for general corporate purposes,
to reduce or refinance indebtedness and to make acquisitions or engage in other
business opportunities. Any proceeds of securities issued by either of the
trusts would be used to purchase subordinated debt securities from us.

                RATIOS OF EARNINGS TO FIXED CHARGES AND EARNINGS
             TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

      The ratio of earnings to fixed charges and the ratio of earnings to
combined fixed charges and preferred stock dividends for each of our last five
fiscal years appear below. We computed the ratio of earnings to fixed charges by
dividing earnings by fixed charges. We computed the ratio of earnings to
combined fixed charges and preferred stock dividends by dividing earnings by the
sum of fixed charges and preferred dividend requirements. Earnings consist of
income (loss) from continuing operations before income taxes, minus
undistributed earnings of associated companies, plus amortization of capitalized
interest and fixed charges, less interest capitalized during the


                                       6


period. Fixed charges consist of interest expense on all indebtedness, interest
capitalized during the period, amortization of debt issuance expense and the
portion of rental expense representative of interest. We had no outstanding
preferred stock and paid no preferred stock dividends after 1999.

RATIO OF EARNINGS TO FIXED CHARGES



                                  YEAR ENDED DECEMBER 31
               -----------------------------------------------------------------
               1997               1998          1999         2000           2001
               ----               ----          ----         ----           ----
                                                             
                 *                3.63          5.27         3.56             *


----------

      * Earnings for the years ended December 31, 1997 and 2001 were inadequate
to cover fixed charges by approximately $742.2 million and $61.5 million,
respectively.

RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS



                                  YEAR ENDED DECEMBER 31
               -----------------------------------------------------------------
               1997               1998          1999         2000           2001
               ----               ----          ----         ----           ----
                                                             
                 *                2.53          4.25         3.56             *


----------

      * Earnings for the years ended December 31, 1997 and 2001 were inadequate
to cover combined fixed charges and preferred stock dividends by approximately
$742.2 million and $61.5 million, respectively.

                         DESCRIPTION OF DEBT SECURITIES

      This section describes the general terms and provisions of our debt
securities. You should refer to the applicable indenture and the applicable
prospectus supplement for more specific information and the specific terms of a
particular offering.

GENERAL

      Our debt securities will be either senior debt securities or subordinated
debt securities. The senior debt securities will rank equally with all of our
existing and future unsecured and unsubordinated indebtedness. The subordinated
debt securities will rank junior to all of our existing and future senior
indebtedness in right of payment.

      The senior debt securities will be issued under a senior indenture between
us and HSBC Bank USA or another trustee chosen by us, and the subordinated debt
securities will be issued under a subordinated indenture between us and HSBC
Bank USA or another trustee chosen by us, in each case, as may be supplemented
by a supplemental indenture relating to the specific terms of the debt
securities offered. We have filed forms of both indentures as exhibits to the
registration statement of which this prospectus is a part.

      The indentures will not limit the amount of debt securities that we may
issue and will permit us to issue securities from time to time in one or more
series. We may issue our debt securities separately, upon conversion of or in
exchange for our preferred stock or other debt securities or as part of a stock
purchase unit. The debt securities will be our direct unsecured general
obligations. They may bear interest at a fixed or floating rate or they may not
bear interest. We may issue debt securities at, above or below their stated
principal amount, as described more fully in the applicable prospectus
supplement.

      The applicable prospectus supplement will describe the following terms of
any series of debt securities that we may offer:


                                       7

      -     the title of the debt securities;

      -     whether they are senior or subordinated;

      -     the total amount of the debt securities authorized and the amount
            outstanding, if any;

      -     any limit on the aggregate principal amount of the debt securities
            offered by that prospectus supplement;

      -     when the principal of the debt securities will mature;

      -     the interest rate, if any, or the method for determining it,
            including any procedures to determine, vary or reset the interest
            rate;

      -     when interest, if any, will be payable, as well as the record dates
            for determining to whom we will pay interest;

      -     where the principal of, and premium and interest if any on, the debt
            securities will be paid;

      -     redemption, call, repurchase or sinking fund provisions, if any;

      -     whether the debt securities will be issued in global or certificated
            form and, in the case of global securities, the name of the
            depositary, if any;

      -     if we are going to make payments to the holder in a foreign currency
            or currencies, the currency or currencies and manner of conversion
            from U.S. dollars;

      -     any index we may use to determine the amount of payment of principal
            of, and premium and interest if any on, the debt securities;

      -     whether the debt securities are convertible into or exchangeable for
            any other securities and the terms and conditions upon which a
            conversion or exchange may occur;

      -     any additions or changes to events of default or covenants provided
            in the applicable indenture;

      -     any other terms of the debt securities that vary from the terms in
            the applicable indenture;

      -     any material U.S. federal income tax considerations; and

      -     any other information we think is important with respect to the
            terms and other provisions of the securities.

DENOMINATIONS, REGISTRATION AND TRANSFER

      We will issue debt securities as registered securities (without coupons)
either in certificated form or in the form of one or more global securities. We
will issue book-entry debt securities as registered global securities. Each
global security will be issued in the denomination of the aggregate principal
amount of the securities that it represents. Unless otherwise stated in the
applicable prospectus, we will issue the debt securities in denominations of
$1,000 or integral multiples thereof.

      A holder may exchange certificated debt securities for other debt
securities of the same series in a like aggregate principal amount but in
different authorized denominations. Whenever any such debt securities are
surrendered for exchange, we will execute, and the trustee will authenticate and
deliver, the debt securities that the holder making the exchange is entitled to
receive.


                                       8

      A holder may present debt securities in certificated form for registration
of transfer (with the form of transfer printed on the security duly executed) at
the office of the security registrar that we designate for such purpose. Unless
we state otherwise in the applicable prospectus supplement, the security
registrar will be the trustee we appointed under the indenture for the
applicable debt securities. There will be no service charge to register the
transfer, but the holder is responsible for paying any taxes and other
governmental charges. Any transfer or exchange is subject to the security
registrar being satisfied with the documents of title and identity of the person
making the request.

      For a discussion of restrictions on the exchange, registration and
transfer of global securities, see the section below entitled "-- Global
Securities".

PAYMENT AND PAYING AGENTS

      Unless otherwise indicated in an applicable prospectus supplement, we will
pay the principal of, and premium and interest if any on, debt securities to a
paying agent, whom we will designate from time to time. However, at our option
we may pay any interest (1) by check mailed to you at your address appearing in
the security register or (2) by wire transfer to an account maintained by you.
Unless otherwise stated in the applicable prospectus supplement, we will pay
interest to you on the applicable payment date if the debt security is
registered in your name at the close of business on the regular record date for
that interest payment.

      Unless otherwise indicated in an applicable prospectus supplement, the
trustee under the applicable indenture will act as our sole paying agent through
its principal office. We may at any time designate additional paying agents or
rescind the designation of any paying agent or approve a change in the office
through which any paying agent acts, except that we will be required to maintain
a paying agent in each place of payment for each series. If, after two years,
moneys that we paid to a paying agent remain unclaimed, the paying agent will
remit the moneys to us, together with any interest, and you may look only to us
for payment (or to the applicable state if we are required to escheat the
moneys).

GLOBAL SECURITIES

      We will deposit any global securities with a depositary or its nominee
identified in the applicable prospectus supplement. While the applicable
prospectus supplement will describe the specific terms of the depositary
arrangement, we expect the following general provisions to apply to our
depositary arrangements:

      Global securities will be registered in the name of the depositary or its
nominee. Upon the issuance of a global security, the depositary or nominee will
credit, on its book-entry registration and transfer system, the principal
amounts of the debt securities represented by the global security to the
accounts of institutions that have accounts with the depositary or nominee. If
we are offering and selling the debt securities directly, we will designate the
accounts to be credited; otherwise, our underwriter or agent will do so.
Ownership of beneficial interests in a global security will be limited to
participating institutions or their clients. The depositary or its nominee will
keep records of the ownership and transfer of beneficial interests in a global
security by participating institutions. Participating institutions will keep
records of the ownership and transfer of beneficial interests by their clients.
The laws of some jurisdictions may require that purchasers of securities receive
them in certificated form. This may limit the ability to transfer beneficial
interests in a global security.

      So long as the depositary or its nominee is the registered owner of a
global security, it will be considered the sole owner or holder of the debt
securities represented by the global security for all purposes under the
applicable indenture. Except as set forth below, owners of beneficial interests
in the global securities will not be entitled to have debt securities
represented by the global security registered in their names, will not receive
or be entitled to receive debt securities in certificated form and will not be
considered the owners or holders thereof under the applicable indenture.
Accordingly, if a holder owns a beneficial interest in a global security, the
holder must rely on the depositary and, if applicable, the participating
institution of which that holder is a client to exercise the rights of that
holder under the applicable indenture.

      The depositary may grant proxies and otherwise authorize participating
institutions to take any action that a holder is entitled to take under the
indentures. We understand that, according to existing industry practices, if we


                                       9

request any action of holders, or any owner of a beneficial interest in a global
security wishes to give any notice or take any action, the depositary would
authorize the participating institutions to give the notice or take the action,
and the participating institutions would in turn authorize their clients to give
the notice or take the action.

      Generally, we will make payments on debt securities represented by a
global security directly to the depositary or its nominee. It is our
understanding that the depositary will then credit the accounts of participating
institutions, which will then distribute funds to their clients. We also expect
that payments by participating institutions to their clients will be governed by
standing instructions and customary practices, as is now the case with
securities held for the accounts of clients registered in "street names," and
will be the responsibility of the participating institutions. Neither we nor the
trustees, nor our respective agents, will have any responsibility, or bear any
liability, for any aspects of the records relating to or payments made on
account of beneficial interests in a global security, or for maintaining,
supervising or reviewing records relating to beneficial interests.

      Generally, a global security may be exchanged for certificated debt
securities only in the following instances:

      -     the depositary notifies us that it is unwilling or unable to
            continue as depositary, or it ceases to be a registered clearing
            agency, if required to be registered by law, and thereafter a
            successor is not appointed within 90 days; or

      -     we determine in our sole discretion that we will no longer have debt
            securities represented by global securities or that we will permit
            global securities to be exchanged for certificated debt securities.

CERTAIN COVENANTS APPLICABLE TO SENIOR DEBT SECURITIES

      Unless otherwise indicated in the applicable prospectus supplement, senior
debt securities will have the benefit of the following covenants contained in
the senior indenture, and subordinated debt securities will not have the benefit
of these covenants:

Limitation Upon Mortgages and Liens

      Neither Unisys nor a Subsidiary will create or assume, except in favor of
Unisys or a Wholly-Owned Subsidiary, any mortgage, pledge, lien or encumbrance
upon any Real Property or any stock or indebtedness of any Subsidiary without
equally and ratably securing the outstanding senior debt securities. This
limitation will not apply to permitted encumbrances specified in the senior
indenture, including:

      -     mortgages, pledges, liens and encumbrances existing on the execution
            date of the senior indenture;

      -     purchase money mortgages entered into within specified time limits;

      -     liens existing on acquired property;

      -     tax, materialmen's, mechanics' and judgment liens, liens arising by
            operation of law and other similar liens;

      -     liens in connection with government contracts;

      -     mortgages, pledges, liens or encumbrances in favor of any state or
            local government or governmental agency in connection with
            tax-exempt financings;

      -     pledges of customers' accounts or paper; and

      -     mortgages, pledges, liens and encumbrances not otherwise permitted
            if the sum of the indebtedness thereby secured plus the Attributable
            Debt in respect of certain sale and leaseback


                                       10

            transactions does not exceed the greater of $250,000,000 or 5% of
            Consolidated Stockholders' Equity.

Limitation Upon Sale and Leaseback Transactions

      Unisys and any Subsidiary will be prohibited from selling any Real
Property with the intention of taking back a lease thereof (other than a
temporary lease of not more than 36 months), unless:

      -     the sum of the Attributable Debt with respect to property involved
            in sale and leaseback transactions not otherwise permitted plus all
            indebtedness secured by certain mortgages, pledges, liens and
            encumbrances does not exceed the greater of $250,000,000 or 5% of
            Consolidated Stockholders' Equity; or

      -     the greater of the net proceeds of the sale or the fair market value
            of the Real Property (which may be conclusively determined by our
            board of directors) are applied within 120 days to the optional
            retirement of outstanding senior debt securities or to the optional
            retirement of other Funded Debt (as defined in the senior indenture)
            ranking on a parity with the senior debt securities.

Certain Definitions

      The capitalized terms used in the summary of the covenants above have the
      following definitions:

      "Attributable Debt" means, as to any sale and leaseback transaction, at
      any date as of which the amount thereof is to be determined, the total
      amount determined by multiplying (1) the aggregate sale price of the Real
      Property by (2) a fraction, the numerator of which is the number of months
      in the unexpired term of the lease of the Real Property and the
      denominator of which is the number of months in the full term of such
      lease (in each case excluding any renewal term unless the renewal is at
      the option of the lessor).

      "Consolidated Stockholders' Equity" means the total stockholders' equity
      of Unisys and its consolidated subsidiaries which, under generally
      accepted accounting principles in the United States, would appear on a
      consolidated balance sheet of Unisys and its subsidiaries, excluding
      direct equity adjustments effected pursuant to certain generally accepted
      accounting principles.

      "Real Property" means any real property, and any building, structure or
      other facility thereon, located in the United States that Unisys or any
      Subsidiary owns and that has a gross book value (without deduction of any
      depreciation reserves) on the date as of which the determination is being
      made in excess of 1% of Consolidated Stockholders' Equity. The definition
      excludes any such real property and any building, structure or other
      facility or portion thereof thereon, that in the opinion of our board of
      directors, is not of material importance to the business conducted by
      Unisys and its Subsidiaries, taken as a whole.

      "Subsidiary" means any corporation of which at least a majority of the
      outstanding voting stock is owned by Unisys or by other Subsidiaries, but
      will not include any such corporation (an "Affiliated Corporation") which:

            -     does not transact any substantial portion of its business or
                  regularly maintain any substantial portion of its operating
                  assets in the United States;

            -     is principally engaged in financing sales or leases of
                  merchandise, equipment or services by Unisys, a Subsidiary or
                  another Affiliated Corporation;

            -     is principally engaged in holding or dealing in real estate;
                  or

            -     is principally engaged in the holding of stock in, and/or the
                  financing of operations of, Affiliated Corporations.


                                       11


      "Wholly-Owned Subsidiary" means a Subsidiary of which all of the
      outstanding voting stock (other than directors' qualifying shares) is at
      the time, directly or indirectly, owned by Unisys and/or by one or more
      Wholly-Owned Subsidiaries.

CONSOLIDATION, MERGER, SALE OR LEASE OF ASSETS

      Each indenture provides that we, without the consent of the holders of any
of the outstanding debt securities, may consolidate with or merge into, or
transfer or lease our assets substantially as an entirety to, any corporation
organized under the laws of any domestic jurisdiction, provided that:

      -     the successor corporation assumes our obligations under the
            indenture and the debt securities issued thereunder;

      -     after giving effect to the transaction, no event of default and no
            event which, after notice or lapse of time, would become an event of
            default shall have occurred and be continuing; and

      -     any other conditions that may be specified with respect to a
            particular series of debt securities are met.

EVENTS OF DEFAULT

      Except as may be provided in a prospectus supplement, any of the following
events will constitute an event of default for a series of debt securities under
an indenture:

      -     failure to pay principal of or any premium on any debt security of
            that series when due;

      -     failure to pay any interest on any debt security of that series when
            due, continued for 30 days;

      -     failure to deposit any sinking fund payment in respect of any debt
            security of that series when due;

      -     failure to perform any other covenant of Unisys in the applicable
            indenture (other than a covenant included in the indenture solely
            for the benefit of a series of debt securities other than that
            series), continued for 60 days after written notice as provided in
            the indenture;

      -     certain events of bankruptcy, insolvency or reorganization; and

      -     any other event of default provided with respect to debt securities
            of that series.

      If there is an event of default with respect to a series of our debt
securities, which continues for the requisite amount of time, either the trustee
or holders of at least 25% in aggregate principal amount of that series may
declare the principal amount of all the debt securities of that series to be due
and payable immediately. If we issued the securities with original issue
discount, less than the stated principal amount may become payable. At any time
after a declaration of acceleration with respect to debt securities of any
series has been made, but before a judgment or decree based on acceleration has
been obtained, the holders of a majority in aggregate principal amount of
outstanding debt securities of that series may, under certain circumstances,
rescind and annul the acceleration.

      Each of the indentures provides that, subject to the trustee's duty to act
with the required standard of care during a default, the applicable trustee will
be under no obligation to exercise any of its rights or powers under the
indenture at the request or direction of any of the holders, unless the holders
have offered reasonable indemnity to the applicable trustee. Subject to these
provisions for the indemnification of the trustee, the holders of a majority in
aggregate principal amount of the outstanding debt securities of any series will
have the right to direct the time, method and place of conducting any proceeding
for any remedy available to the trustee, or exercising any trust or power
conferred on the trustee, with respect to the debt securities of that series.

      We are required to furnish the trustees annually with a statement as to
our compliance with our obligations under the indentures and as to any defaults.


                                       12

MODIFICATION AND WAIVER

      We and the trustees may enter into supplemental indentures without the
consent of any holders of the debt securities for the purposes, among other
things, of expanding our covenants for the benefit of the holders of any series
of debt securities, adding additional events of default for the benefit of the
holders of any series of debt securities, adding guarantees, establishing the
form or terms of debt securities or curing ambiguities or inconsistencies.

      We may make other modifications and amendments to the indentures with the
consent of the holders of a majority in aggregate principal amount of the
outstanding debt securities of each series affected by the modification or
amendment. However, the consent of all of the holders of our debt securities
that are affected by a modification or amendment is required:

      -     to change the stated maturity of the principal of, or any
            installment of principal or interest on, any debt security;

      -     to reduce the principal amount of, or any premium or interest on,
            any debt security;

      -     to reduce the amount of principal of debt securities issued with
            original issue discount payable upon acceleration of the maturity
            thereof;

      -     to change the currency of payment of principal of, or any premium or
            interest on, any debt security;

      -     to impair the right to institute suit for the enforcement of any
            payment on or with respect to any debt security; or

      -     to reduce the percentage in principal amount of outstanding debt
            securities of any series, the consent of whose holders is required
            for modification or amendment of the indenture.

      The holders of a majority in aggregate principal amount of the outstanding
debt securities of each series may, on behalf of all holders of debt securities
of that series, waive any past default under the applicable indenture with
respect to debt securities of that series, except a default in the payment of
the principal of, or premium or interest if any on, any of the debt securities
of that series or in respect of a covenant or provision of the indenture that
cannot, under the terms of the indenture, be modified or amended without the
consent of the holders of each outstanding debt security affected thereby.

DEFEASANCE

      Except as specified with respect to debt securities of a particular
series, we may discharge our obligations in respect of the debt securities of
any series (including, in the case of the senior debt securities, our
obligations to abide by certain covenants) by depositing with the trustee, in
trust, money or government obligations which, through the payment of interest,
principal and premium, if any, in accordance with their terms, will provide
money in an amount sufficient to pay all the interest, principal and premium, if
any, on the debt securities of that series on the dates those payments are due
in accordance with the terms of the series. We must also, among other things,
deliver to the applicable trustee an opinion of counsel to the effect that (1)
the deposit and related defeasance would not cause the holders of the debt
securities of the series to recognize income, gain or loss for U.S. income tax
purposes and (2) the holders would be subject to federal income tax on the same
amounts, in the same manner and at the same times as would have been the case if
the deposit and related defeasance had not occurred. Notwithstanding the
foregoing, we may not be discharged from certain obligations to register the
transfer or exchange of debt securities of a series, convert debt securities of
a series, replace stolen, lost or mutilated debt securities of a series,
maintain paying agencies or hold moneys for payment in trust.


                                       13

CONVERSION RIGHTS

      The applicable prospectus supplement will describe the terms on which
holders of our subordinated debt securities of a series may convert the
securities into our common stock. Conversion may be mandatory, at the option of
the holder, or at our option, as described in the applicable prospectus
supplement.

SUBORDINATION PROVISIONS

      Our subordinated debt securities will be subordinated in right of payment,
to the extent provided in the subordinated indenture or as described in an
applicable prospectus supplement, to the prior payment in full of our senior
indebtedness. If we distribute our assets to creditors upon liquidation,
dissolution, reorganization, insolvency, bankruptcy or under similar
circumstances, holders of our senior debt will be entitled to be paid in full
before any payments will be made on our subordinated debt securities. In
addition, unless otherwise provided in an applicable prospectus supplement, we
will not make any payment of principal, premium or interest with respect to
subordinated debt securities or on account of their purchase, redemption or
other acquisition if any default in the payment of principal, premium or
interest on any senior indebtedness occurs and continues beyond any applicable
grace period.

      If the subordinated trustee or the holders of our subordinated debt
securities receive a payment that should not have been paid because of the
existence of any of the events described above, they will be required to turn
over the funds to the holders of our senior debt. In addition, subject to the
payment in full of all senior debt, holders of subordinated debt securities will
be subrogated to the rights of the holders of that senior debt with respect to
the right to receive payments or distributions of our cash, property or
securities applicable to that senior debt until all amounts owing on the
subordinated debt securities are paid in full.

      By reason of this subordination, in the event of a distribution of assets
upon insolvency, certain of our creditors may recover more, ratably, than
holders of the subordinated debt securities.

      The subordinated indenture will not place any limits on the amount of
other indebtedness, including senior indebtedness that we may issue.

      "Senior indebtedness" with respect to any series of subordinated debt
securities will have the meaning specified in the applicable prospectus
supplement for that series. The prospectus supplement, or the information
incorporated by reference therein, will also set forth the approximate amount of
senior indebtedness outstanding as of a recent date.

ISSUANCE OF SUBORDINATED DEBT SECURITIES TO A TRUST

      If we issue debt securities to a trust in connection with the issuance of
trust preferred securities by that trust, those debt securities subsequently may
be distributed to the holders of the trust preferred and trust common securities
either:

      -     upon the dissolution of the trust; or

      -     upon the occurrence of events that we will describe in the
            applicable prospectus supplement.

NOTICES

      Notices will be mailed to holders of debt securities at their addresses as
they appear in the security register.

GOVERNING LAW

      The indentures and the debt securities will be governed by, and construed
in accordance with, the laws of the State of New York.


                                       14

CONCERNING THE TRUSTEE

      HSBC Bank USA has normal banking relationships with us and participates as
a lender in our revolving credit facility. It also serves as trustee under other
indentures with us pursuant to which unsecured senior debt securities are
currently outstanding.

                          DESCRIPTION OF CAPITAL STOCK

      This section describes the general terms of our common stock, including
associated rights to purchase shares of our junior participating preferred
stock, our preferred stock and certain provisions of the Delaware General
Corporation Law. For more detailed information, you should refer to our restated
certificate of incorporation, by-laws and rights agreement as amended, copies of
which have been filed with the SEC and incorporated by reference into this
prospectus, and the relevant provisions of the Delaware General Corporation Law.

GENERAL

      Our authorized capital stock consists of:

      -     720,000,000 shares of common stock, par value $.01 per share; and

      -     40,000,000 shares of preferred stock, par value $1 per share,
            including 1.5 million shares that have been designated as junior
            participating preferred stock.

As of December 31, 2001, there were approximately 320.5 million shares of common
stock and no shares of preferred stock outstanding.

COMMON STOCK

      Subject to the rights of any holders of shares of preferred stock and
except as otherwise may be required by applicable law, holders of shares of
common stock:

      -     are entitled to receive dividends when and as declared by the board
            of directors from funds legally available for that purpose;

      -     have the exclusive right to vote on all matters on which
            stockholders generally are entitled to vote, including the election
            of directors, and are entitled to one vote per share; and

      -     are entitled, upon any liquidation, dissolution or winding up of
            Unisys, to a pro rata distribution of the assets and funds available
            for distribution to stockholders.

Holders of shares of common stock do not have preemptive rights to subscribe for
additional shares of common stock or securities convertible into shares of
common stock. The common stock is listed on the New York Stock Exchange under
the symbol "UIS". EquiServe Limited Partnership and its subsidiary EquiServe
Trust Company, N.A. are the transfer agent for our common stock and our rights
agent.

      We have not declared or paid any cash dividends on our common stock since
1990 and do not anticipate declaring or paying dividends on the common stock in
the foreseeable future. Certain of our debt instruments and credit facilities
may restrict our ability to pay dividends.

      Any shares of common stock that we issue will be fully paid and
nonassessable.

PREFERRED SHARE PURCHASE RIGHTS AND JUNIOR PARTICIPATING PREFERRED STOCK

      We have distributed to our stockholders one preferred share purchase right
for each outstanding share of common stock pursuant to a Rights Agreement dated
as of March 7, 1986, as amended. Each right entitles its


                                       15

holder, until the earlier of March 17, 2006 or the redemption of the rights, to
buy one three-hundredth of a share of our junior participating preferred stock
at an exercise price of $75. The rights are represented by the certificates for
shares of common stock and will not be exercisable, or transferable apart from
the shares of common stock, until the earlier of the tenth day after the
announcement that a person or group has acquired beneficial ownership of 20% or
more of the shares of common stock (a "20% holder") or the tenth day after a
person commences, or announces an intention to commence, an offer that, if
consummated, would result in a person beneficially owning 30% or more of the
shares of common stock as of that date. The rights could then begin trading
separately from the shares of common stock.

      If Unisys is acquired in a merger or other business combination
transaction, each right will entitle its holder to purchase, at the exercise
price of the right, common stock of the surviving company having a market value
of two times the exercise price of the right. Alternatively, if a 20% holder
were to acquire Unisys by means of a reverse merger in which Unisys and its
stock survive, or were to engage in certain "self-dealing" transactions, each
right not owned by the 20% holder would become exercisable for common stock
having a market value of two times the exercise price of the right.

      The rights are redeemable at $.01 2/3 per right at any time prior to the
time that a person or group becomes a 20% holder. The rights will expire on
March 17, 2006, unless we extend the expiration date or redeem the rights
earlier. At no time will the rights have any voting rights.

      The shares of junior participating preferred stock purchasable upon
exercise of the rights will be nonredeemable. Each share of junior participating
preferred stock will have a preferential quarterly dividend equal to the greater
of (1) $15 per share or (2) 300 times the aggregate dividend declared per share
of common stock. In the event of liquidation, the holders of the shares of
junior participating preferred stock will receive a preferred liquidation
payment of $100 per share, and will be entitled to receive an aggregate
liquidation payment per share equal to 300 times the payment made per share of
common stock. Each share of the junior participating preferred stock will have
300 votes, voting together with the shares of common stock. In the event of any
merger, consolidation or other transaction in which shares of common stock are
exchanged, each share of the junior participating preferred stock will be
entitled to receive 300 times the amount received per share of common stock. The
junior participating preferred stock has customary antidilution provisions to
protect the dividend, liquidation and voting rights described above.

      The purchase price payable, and the number of shares of junior
participating preferred stock or other securities or property issuable, upon
exercise of the rights are subject to adjustment from time to time to prevent
dilution in the event of certain dividends on, reclassifications of, or
distributions to the holders of, junior participating preferred stock. The
percentage of a share of junior participating preferred stock for which a right
is exercisable and the number of rights outstanding are also subject to
adjustment in the event of dividends on the shares of common stock payable in
shares of common stock or subdivisions, combinations or consolidations of the
shares of common stock, occurring, in any case, before the rights become
exercisable or transferable apart from the shares of common stock.

      One right is currently associated with each issued and outstanding share
of common stock. We will issue one right with each share of common stock issued
prior to March 17, 2006 unless, prior to the issuance, the rights are redeemed
or become exercisable and transferable apart from the shares of common stock.

      The rights have anti-takeover effects. The rights may cause substantial
dilution to a person or group that attempts to acquire us on terms that the
board of directors determines are not in the best interests of our stockholders.
The rights should not interfere with any merger or other business combination
approved by the board of directors since the rights may be redeemed at $.01 2/3
per right prior to the time that a person or group has acquired beneficial
ownership of 20% or more of the shares of common stock.

PREFERRED STOCK

      Our certificate of incorporation authorizes our board of directors to
provide for the issuance of shares of our preferred stock in multiple series
without the approval of stockholders. With respect to each series of preferred
stock we may offer, our board of directors has the authority, subject to
applicable law, to fix the following terms:


                                       16

      -     the designation of the series;

      -     the number of shares within the series;

      -     the ranking of that series;

      -     whether dividends are cumulative and, if cumulative, the dates from
            which dividends are cumulative;

      -     the dividend rate, any conditions upon which dividends are payable,
            and the dates of payment of dividends;

      -     whether the shares are redeemable, the redemption price and the
            terms of redemption;

      -     the amount payable to you for each share you own if Unisys is
            dissolved or liquidated;

      -     whether the shares are convertible or exchangeable, the price or
            rate of exchange, and the applicable terms and conditions;

      -     any restrictions on issuance of shares in the same series or any
            other series;

      -     your voting rights for the shares you own; and

      -     any other rights, preferences or limitations of that series.

      Holders of any preferred shares will have no preemptive rights with
respect to these shares unless specified in the applicable prospectus
supplement. In addition, your rights with respect to your shares of preferred
stock will be subordinate to the rights of our general creditors. Any shares of
preferred stock that we issue will be fully paid and nonassessable.

      If we offer preferred stock, the applicable prospectus supplement will
describe the specific terms of the shares of preferred stock offered through
that prospectus supplement, as well as any general terms described in this
section that will not apply to those shares of preferred stock. In the
applicable prospectus supplement, we will also discuss any material U.S. federal
income tax considerations applicable to the preferred stock. We will file a copy
of the certificate of designations that contains the terms of each new series of
preferred stock with the SEC each time we issue a new series of preferred stock.
Each certificate of designations will establish the number of shares included in
a designated series and fix the designation, powers, privileges, preferences and
rights of the shares of each series as well as any applicable qualifications,
limitations or restrictions. You should refer to the applicable certificate of
designations as well as our certificate of incorporation before deciding to buy
shares of our preferred stock as described in the applicable prospectus
supplement.

ANTI-TAKEOVER PROVISIONS

Delaware Law

      Unisys is a Delaware corporation and subject to Section 203 of the
Delaware General Corporation Law. Generally, Section 203 prohibits a publicly
held Delaware corporation from engaging in a "business combination" with an
"interested stockholder" for a period of three years after the time of the
transaction in which the person became an interested stockholder. The provision
does not apply if:

      -     prior to such time, either the business combination or such
            transaction is approved by the board of directors of the
            corporation;

      -     upon consummation of the transaction that results in the stockholder
            becoming an interested stockholder, the interested stockholder owns
            at least 85% of the outstanding voting stock; or


                                       17

         -        on or after such time, the business combination is approved by
                  the board and by the affirmative vote of at least 66 2/3% of
                  the outstanding voting stock that is not owned by the
                  interested stockholder.

A "business combination" includes mergers, asset sales and other transactions
resulting in a financial benefit to the interested stockholder. An "interested
stockholder" is a person who, together with affiliates and associates, owns (or
within three years, did own) 15% or more of the corporation's outstanding voting
stock.

Corporate Documents

      Our certificate of incorporation and by-laws also contain anti-takeover
provisions that are intended to enhance the likelihood of continuity and
stability in the composition of the board of directors and that may have the
effect of delaying, deferring or preventing a future takeover or change in
control unless the board approves it. These provisions may also make it more
difficult to remove the current board of directors.

      -     Classified Board -- The certificate of incorporation and by-laws
            provide that the board of directors shall have no fewer than 10 and
            no more than 20 members, with the exact number to be fixed by the
            board of directors. The board of directors is divided into three
            classes of directors, as nearly equal in number as possible. One
            class of directors is elected each year for a term of three years.

      -     Removal of Directors; Vacancies -- Directors may be removed from
            office only for cause and only by the affirmative vote of at least
            80% of the outstanding voting stock. Vacancies in the board of
            directors and newly created directorships are filled for the
            unexpired term only by the vote of a majority of the remaining
            directors in office.

      -     Special Meetings of Stockholders -- Under the certificate of
            incorporation and by-laws, stockholders may not call a special
            meeting of stockholders. Only the board of directors, by resolution
            adopted by a majority of the entire board, may call a special
            meeting of stockholders.

      -     Action by Written Consent -- The Delaware General Corporation Law
            provides that, unless specifically prohibited by the certificate of
            incorporation, any action required or permitted to be taken by
            stockholders of a corporation may be taken without a meeting if a
            written consent setting forth the action to be taken is signed by
            the holders of outstanding shares of capital stock having the
            requisite number of votes that would be necessary to authorize or
            take the action at a meeting of stockholders. Our certificate of
            incorporation requires that stockholder action be taken at a meeting
            of stockholders and prohibits stockholder action by written consent.

      -     Business Combinations -- The certificate of incorporation provides
            that mergers, consolidations, sales or other transfers of assets of,
            issuances or reclassifications of securities of, or adoptions of
            plans of liquidation by Unisys (individually, a "corporate
            transaction") must be approved by 80% or more of the voting stock
            when the action involves a person (a "20% stockholder") who
            beneficially owns more than 20% of the then outstanding shares of
            voting stock, unless minimum price, form of consideration and
            procedural requirements (the "fair price provisions") are satisfied
            or unless a majority of the directors not affiliated with the 20%
            stockholder approve the corporate transaction.

      The affirmative vote of 80% or more of the then outstanding shares of
voting stock is required to amend, alter or repeal the provisions of the
certificate of incorporation and by-laws discussed above.

      The purpose of the provisions of the certificate of incorporation and
by-laws relating to (1) a classified board of directors; (2) the removal of
directors and the filling of vacancies; (3) the prohibition of stockholder
action by written consent and (4) supermajority voting requirements for the
repeal of these provisions is to help assure the continuity and stability of our
business strategies and policies and to discourage many types of transactions
that involve an actual or threatened change of control of Unisys. They are
designed to make it more difficult and time-consuming to change majority control
of the board of directors and thus to reduce the vulnerability of Unisys to an


                                       18

unsolicited takeover proposal that does not contemplate the acquisition of at
least 80% of the voting stock or to an unsolicited proposal for the
restructuring or sale of all or part of the company.

      These charter and by-law provisions may make more difficult or discourage
a proxy contest, or the assumption of control, by a holder of a substantial
block of shares of common stock, or the removal of the incumbent board of
directors, and could thus increase the likelihood that incumbent directors will
retain their positions. In addition, since the fair price provisions discussed
above provide that corporate transactions involving Unisys and a 20% stockholder
may not be consummated without the approval of a majority of unaffiliated
directors (unless the transaction meets specified criteria or is approved by
supermajority vote), these provisions could give incumbent management the power
to prevent certain takeovers. The fair price provisions may also discourage
attempts to effect a "two-step" acquisition in which a third party purchases a
controlling interest in cash and acquires the balance of the voting stock for
less desirable consideration. Under the classified board and related provisions,
the third party would not immediately obtain the ability to control the board of
directors through its first-step acquisition and, under the fair price
provisions, having made the first-step acquisition, the third party could not
acquire the balance of the voting stock for a lower price without a
supermajority vote or the approval of a majority of the unaffiliated directors.

      These provisions of the certificate of incorporation and by-laws help
ensure that the board of directors, if confronted with an unsolicited proposal
from a third party that has acquired a block of shares of common stock, will
have sufficient time to review the proposal and to consider appropriate
alternatives for Unisys stockholders.

      These provisions are also intended to encourage persons seeking to acquire
control of Unisys to initiate such an acquisition through arm's-length
negotiations with the board of directors, who would then be in a position to
negotiate a transaction that would treat all stockholders in substantially the
same manner. The provisions may have the effect of discouraging a third party
from making an unsolicited tender offer or otherwise attempting to obtain
control of Unisys, even though such an attempt might be beneficial to the
company and its stockholders. In addition, since the provisions are designed to
discourage accumulations of large blocks of shares of common stock by purchasers
whose objective is to have those shares repurchased by the company at a premium,
the provisions could tend to reduce the temporary fluctuations in the market
price of common stock caused by these accumulations. Accordingly, Unisys
stockholders could be deprived of the opportunity to sell their shares at a
potentially higher market price.

      The preferred share purchase rights described above could also have the
effect of delaying, deferring or preventing a takeover or change in control of
Unisys.

                             DESCRIPTION OF WARRANTS

      We may issue warrants for the purchase of our debt securities, preferred
stock or common stock. We may issue warrants independently or together with
other securities. Each series of warrants will be issued under a separate
warrant agreement to be entered into between us and a bank or trust company, as
warrant agent. The warrant agent will act solely as our agent in connection with
the warrants and will not have any obligation or relationship of agency or trust
for or with any holders or beneficial owners of warrants. We will file a copy of
the warrant agreement with the SEC in connection with any offering of warrants.

      We will describe the terms of any warrants we issue in a prospectus
supplement. Those terms will include the following:

      -     the title of the warrants;

      -     the offering price for the warrants, if any;

      -     the aggregate number of the warrants;

      -     the amount of securities that may be purchased upon exercise of a
            warrant and the exercise price;

      -     the currency or currency units in which the offering price, if any,
            and the exercise price are payable;


                                       19

      -     a description of the securities purchasable upon exercise of the
            warrants;

      -     if applicable, a description of the securities with which the
            warrants are issued and the number of warrants issued with each such
            security;

      -     the dates on which the right to exercise the warrants will commence
            and expire;

      -     if applicable, the minimum or maximum amount of warrants that may be
            exercised at any one time;

      -     if applicable, the date on and after which the warrants and the
            related securities will be separately transferable;

      -     information relating to book-entry procedures, if any;

      -     anti-dilution provisions, if any;

      -     redemption or call provisions, if any; and

      -     any other information we think is important.

      In the applicable prospectus supplement, we will also discuss any material
U.S. federal income tax considerations applicable to the warrants.

      DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS

      We may issue stock purchase contracts obligating holders to purchase from
us and obligating us to sell to the holders, a specified number of shares of
Unisys common stock or other securities at a future date or dates. The price per
share and number of shares of the securities may be fixed at the time the stock
purchase contracts are issued or may be determined by reference to a specific
formula set forth in the stock purchase contracts. We may issue the stock
purchase contracts separately or as a part of units, which we refer to as stock
purchase units. Stock purchase units would consist of (1) a stock purchase
contract and (2) Unisys debt securities or preferred stock, trust preferred
securities or debt obligations of third parties (including U.S. Treasury
securities), which may be pledged to secure the holders' obligations to purchase
the securities under the stock purchase contracts. The stock purchase contracts
may require us to make periodic payments to the holders of the stock purchase
units or vice versa, and such payments may be unsecured or prefunded on some
basis. The stock purchase contracts may require holders to secure their
obligations in a specified manner.

      The applicable prospectus supplement will describe the terms of any stock
purchase contracts or stock purchase units. The description in the prospectus
supplement will not necessarily be complete, and reference may be made to the
stock purchase contracts, and, if applicable, collateral arrangements and
depositary arrangements, relating to the stock purchase contracts or stock
purchase units. In the applicable prospectus supplement, we will also discuss
any material U.S. federal income tax considerations applicable to the stock
purchase units or stock purchase contracts.


                                       20

                    DESCRIPTION OF TRUST PREFERRED SECURITIES

GENERAL

      The declaration of each trust authorizes the regular trustees of the trust
to issue one series of trust preferred securities, the terms of which will be
described in the applicable prospectus supplement. The declaration will be
qualified as an indenture under the Trust Indenture Act. The trust preferred
securities will have the terms, including distributions, redemption, voting and
liquidation rights and other preferred, deferred or other special rights or
restrictions as are described in the declaration or made part of the declaration
by the Trust Indenture Act. These terms will mirror the terms of the
subordinated debt securities issued by Unisys to the trust and described in the
applicable prospectus supplement. You should read the prospectus supplement
relating to the trust preferred securities of the trust for specific terms,
including:

      -     the designation of the trust preferred securities;

      -     the number of trust preferred securities issued by the trust;

      -     the annual distribution rate or method of determining that rate, the
            distribution payment dates, the record dates for distribution
            payments and any additional amounts that may be payable with respect
            to the trust preferred securities;

      -     whether distributions will be cumulative and compounding and, if so,
            the dates from which distributions will be cumulative or compounded;

      -     any rights to defer distributions on the trust preferred securities
            by extending the interest payment period on the debt securities;

      -     the amount or amounts that will be paid out of the assets of the
            trust to the holders of trust preferred securities of the trust upon
            voluntary or involuntary dissolution, winding-up or termination of
            the trust;

      -     the obligation, if any, of the trust to purchase or redeem trust
            preferred securities issued by the trust and terms and conditions of
            such repurchase or redemption;

      -     the voting rights, if any, of trust preferred securities issued by
            the trust in addition to those required by law, including the number
            of votes per trust preferred security and any requirement for the
            approval by the holders of trust preferred securities, or of trust
            preferred securities issued by one or more trusts, or of both, as a
            condition to specified action or amendments to the declaration of
            that trust;

      -     the terms and conditions, if any, upon which the subordinated debt
            securities may be distributed to holders of trust preferred
            securities;

      -     any terms for any conversion or exchange of the debt securities or
            the trust preferred securities into other securities;

      -     if applicable, any securities exchange upon which the trust
            preferred securities will be listed; and

      -     any other relevant rights, preferences, privileges, limitations or
            restrictions of trust preferred securities issued by the trust not
            inconsistent with the declaration of the trust or with applicable
            law.

      In the applicable prospectus supplement, we will also discuss any material
U.S. federal income tax considerations applicable to the trust preferred
securities.

      In connection with the issuance of trust preferred securities, each trust
will issue one series of common securities. The declaration of each trust
authorizes the regular trustees of that trust to issue one series of common
securities that have the terms, including distributions, redemption, voting and
liquidation rights or other restrictions,


                                       21

that are described in the declaration. The terms of the common securities issued
by a trust will be substantially identical to the terms of the trust preferred
securities issued by that trust and the common securities will rank equally, and
payments will be made on them proportionately, with the trust preferred
securities except that, upon an event of default under the declaration, the
rights of the holders of the common securities to payment in respect of
distributions and payments upon liquidation, redemption and otherwise will be
subordinated to the rights of the holders of the trust preferred securities.
Except in certain limited circumstances, the common securities will also carry
the right to vote to appoint, remove or replace any of the trustees of a trust.
Unisys will own, directly or indirectly, all of the common securities of each
trust.

      Unisys will guarantee all trust preferred securities offered by this
prospectus to the extent set forth under the section below entitled "Description
of the Trust Preferred Securities Guarantees".

ENFORCEMENT OF CERTAIN RIGHTS BY HOLDERS OF TRUST PREFERRED SECURITIES

      If an event of default under the declaration of one of the trusts occurs,
then the holders of trust preferred securities of that trust would rely on the
enforcement by the institutional trustee of its rights as a holder of the
applicable series of subordinated debt securities against us. In addition, the
holders of a majority in liquidation amount of the trust preferred securities of
that trust may direct the time, method and place of conducting any proceeding
for any remedy available to the institutional trustee or direct the exercise of
any trust or power conferred on the institutional trustee under the applicable
declaration, including the right to direct the institutional trustee to exercise
the remedies available to it as a holder of the subordinated debt securities. If
the institutional trustee does not enforce its rights under the applicable
series of subordinated debt securities, a holder of trust preferred securities
may institute a legal proceeding directly against us to enforce the
institutional trustee's rights under the applicable series of subordinated debt
securities without first instituting any legal proceeding against the
institutional trustee or any other person or entity.

      Notwithstanding the above, if an event of default under the applicable
declaration occurs and that event is attributable to our failure to pay interest
or principal on the applicable series of subordinated debt securities on the
applicable due date (or in the case of redemption, on the redemption date), then
a holder of trust preferred securities of that trust may directly institute a
proceeding for enforcement of payment on the subordinated debt securities having
a principal amount equal to the aggregate liquidation amount of the trust
preferred securities of that holder on or after the respective due date
specified in the applicable series of subordinated debt securities. In
connection with such a direct action, we will be subrogated to the rights of the
holder of trust preferred securities under the applicable declaration to the
extent of any payment we make to that holder in such a direct action.

              DESCRIPTION OF TRUST PREFERRED SECURITIES GUARANTEES

      Set forth below is a summary of information concerning the trust preferred
securities guarantees which we will execute and deliver for the benefit of the
holders of trust preferred securities. Each guarantee will be qualified as an
indenture under the Trust Indenture Act. HSBC Bank USA, or another trustee
chosen by us, will act as indenture trustee under each guarantee for purposes of
the Trust Indenture Act.

      Because the following is only a summary of the guarantee, it does not
contain all of the information that you may find useful. For more information,
you should read the form of guarantee, which is filed as an exhibit to the
registration statement of which this prospectus forms a part. Each guarantee
will be held by the guarantee trustee for the benefit of the holders of the
trust preferred securities of the applicable trust.

GENERAL

      Pursuant to each guarantee, we will irrevocably and unconditionally agree
to pay in full, to the holders of the trust preferred securities issued by a
trust, the guarantee payments (described below) (except to the extent paid by
that trust), as and when due, regardless of any defense, right of set-off or
counterclaim which that trust may have or assert. The following payments with
respect to trust preferred securities issued by a trust to the extent not paid
by that trust are called guarantee payments, and will be subject to the
guarantee (without duplication):


                                       22

      -     any accrued and unpaid distributions that must be paid on the trust
            preferred securities, to the extent the trust has funds available;

      -     the redemption price, including all accrued and unpaid
            distributions, to the extent the trust has funds available, with
            respect to any trust preferred securities called for redemption by
            that trust; and

      -     upon a voluntary or involuntary dissolution, winding-up or
            termination of the trust (other than in connection with the
            distribution of subordinated debt securities to the holders of trust
            preferred securities or the redemption of all of the trust preferred
            securities), the lesser of:

            -     the aggregate of the liquidation amount and all accrued and
                  unpaid distributions on the trust preferred securities to the
                  date of payment, to the extent the trust has funds available,
                  or

            -     the amount of assets of the trust that remain available for
                  distribution to holders of the trust preferred securities in
                  liquidation of the trust.

      The redemption price and liquidation amount will be fixed at the time the
trust preferred securities are issued. We may satisfy our obligation to make a
guarantee payment by directly paying the holders of trust preferred securities
or by causing the applicable trust to pay the holders.

      Each guarantee will not apply to any payment of distributions except to
the extent the trust has funds available. If we do not make interest payments on
the subordinated debt securities purchased by a trust, the trust will not be
able to pay distributions on the trust preferred securities issued by it. The
guarantee, when taken together with our obligations under the subordinated debt
securities, the subordinated debt indenture and the declaration, including our
obligations to pay costs, expenses, debts and liabilities of the trust (other
than with respect to the trust's securities), will provide a full and
unconditional guarantee on a subordinated basis by us of payments due on the
trust preferred securities.

      We have also agreed separately to irrevocably and unconditionally
guarantee the obligations of the trusts with respect to the common securities to
the same extent as the guarantees, except that upon an event of default under
the subordinated debt indenture, holders of trust preferred securities will have
priority over holders of common securities with respect to distributions and
payments on liquidation, redemption or otherwise.

CERTAIN COVENANTS OF UNISYS

      In each guarantee, we will covenant that, so long as any trust preferred
securities issued by the applicable trust remain outstanding, if there is an
event of default under that guarantee or the declaration of that trust, then:

      -     we will not declare or pay any dividend on, make any distributions
            with respect to, or redeem, purchase or make liquidation payments
            with respect to, any of our capital stock, other than:

            -     purchases or acquisitions of shares of our common stock in
                  connection with the satisfaction by us of our obligations
                  under any employee benefit plans or the satisfaction by us of
                  our obligations pursuant to any contract or security requiring
                  us to purchase shares of our common stock,

            -     as a result of a reclassification of our capital stock or the
                  exchange or conversion of one class or series of our capital
                  stock for another class or series of our capital stock, or

            -     the purchase of fractional interests in shares of our capital
                  stock pursuant to the conversion or exchange provisions of
                  such capital stock or the security being converted or
                  exchanged,

            or make any guarantee payments with respect to the above; and

      -     we will not make any payment of interest, principal or premium, if
            any, on or repay, repurchase or redeem any debt securities
            (including guarantees) issued by us which rank equally with or
            junior to such subordinated debt securities.


                                       23

MODIFICATION OF THE TRUST PREFERRED SECURITIES GUARANTEES; ASSIGNMENT

      Except with respect to any changes that do not adversely affect the rights
of holders of trust preferred securities (in which case no vote will be
required), the prior approval of the holders of at least a majority in
liquidation amount of the outstanding trust preferred securities issued by the
applicable trust is required to amend each guarantee. The manner of obtaining
the approval of holders of trust preferred securities will be set forth in an
accompanying prospectus supplement. All guarantees and agreements contained in a
guarantee will bind our successors, assigns, receivers, trustees and
representatives and will inure to the benefit of the holders of the trust
preferred securities of the applicable trust then outstanding.

TERMINATION OF THE GUARANTEE

      A guarantee will terminate upon:

      -     full payment of the redemption price of all trust preferred
            securities of the applicable trust;

      -     distribution of the subordinated debt securities held by the trust
            to the holders of the trust preferred securities; or

      -     full payment of the amounts payable upon liquidation of that trust.

Each guarantee will continue to be effective or will be reinstated, as the case
may be, if at any time any holder of trust preferred securities issued by the
applicable trust must restore payment of any sums paid under the trust preferred
securities or the guarantee.

EVENTS OF DEFAULT

      An event of default under a guarantee will occur if we fail to perform any
of our payment or other obligations under it.

      The holders of a majority in liquidation amount of the trust preferred
securities relating to the guarantee may direct the time, method and place of
conducting any proceeding for any remedy available to the guarantee trustee in
respect of the guarantee or to direct the exercise of any trust or power
conferred on that trustee under those trust preferred securities. If that
trustee fails to enforce the guarantee, any holder of trust preferred securities
relating to that guarantee may institute a legal proceeding directly against us
to enforce the guarantee trustee's rights under the guarantee, without first
instituting a legal proceeding against the relevant trust, that trustee or any
other person or entity.

      Notwithstanding the above, if we fail to make a guarantee payment, a
holder of trust preferred securities may directly institute a proceeding against
us for enforcement of the guarantee for that payment. We waive any right or
remedy to require that any action be brought first against the trust or any
other person or entity before proceeding directly against us.

      The guarantee trustee, before the occurrence of a default with respect to
a guarantee, performs only the duties specifically set forth in the guarantee
and, after default, will exercise the same degree of care as a prudent
individual would exercise in the conduct of his or her own affairs. Subject to
the above, the guarantee trustee is under no obligation to exercise any of the
powers vested in it by a guarantee at the request of any holder of trust
preferred securities, unless offered reasonable indemnity against the costs,
expenses and liabilities that might be incurred.

STATUS OF THE TRUST PREFERRED SECURITIES GUARANTEES

      The guarantees will constitute unsecured obligations of ours and will
rank:

      -     subordinate and junior in right of payment to all our other
            liabilities,


                                       24

      -     equally with the most senior preferred or preference stock now or
            later issued by us and with any guarantee now or later entered into
            by us in respect of any preferred or preference stock of any
            affiliate of ours, and

      -     senior to our common stock.

      The terms of the trust preferred securities will provide that each holder
of trust preferred securities issued by an applicable trust agrees to the
subordination provisions and other related terms of the guarantee.

      The guarantees will constitute a guarantee of payment and not of
collection. That is, the guaranteed party may institute a legal proceeding
directly against the guarantor to enforce its rights under the guarantee without
instituting a legal proceeding against any other person or entity.

INFORMATION CONCERNING THE TRUST PREFERRED SECURITIES GUARANTEE TRUSTEE

      HSBC Bank USA has normal banking relationships with us and participates as
a lender in our revolving credit facility.

GOVERNING LAW

      The guarantees will be governed by and construed in accordance with the
laws of New York State.

                           EFFECT OF OBLIGATIONS UNDER
               THE SUBORDINATED DEBT SECURITIES AND THE GUARANTEES

      As set forth in the declaration of each trust, the sole purpose of each
trust is to issue securities evidencing undivided beneficial interests in the
assets of that trust, and to invest the proceeds from that issuance and sale in
the subordinated debt securities.

      As long as payments of interest and other payments are made when due on
the subordinated debt securities, those payments will be enough to cover
distributions and payments due on a trust's securities because of the following
factors:

      -     the aggregate principal amount of subordinated debt securities will
            be equal to the sum of the aggregate stated liquidation amount of
            the trust's securities;

      -     the interest rate and the interest and other payment dates on the
            subordinated debt securities will match the distribution rate and
            distribution and other payment dates for the trust preferred
            securities;

      -     we will pay, and the applicable trust will not be obligated to pay,
            directly or indirectly, all costs, expenses, debt and obligations of
            the applicable trust (other than with respect to the trust
            securities); and

      -     the declaration provides that the trustees will not take or cause or
            permit the applicable trust to, among other things, engage in any
            activity that is not consistent with the purposes of the applicable
            trust.

      We guarantee all payments of distributions, to the extent funds are
available, and other payments due on the trust preferred securities, to the
extent funds are available, as set forth under "Description of Trust Preferred
Securities Guarantees" above. If we do not make interest payments on the
subordinated debt securities purchased by the applicable trust, the trust will
not have enough funds to pay distributions on the trust preferred securities.

      The guarantee does not apply to any payment of distributions unless and
until the applicable trust has enough funds to pay any distributions. The
guarantee covers the payment of distributions and other payments on the


                                       25

trust preferred securities only if and to the extent that we have made a payment
of interest or principal on the subordinated debt securities held by the
applicable trust as its sole asset.

      The guarantee, when taken together with our obligations under the
subordinated debt securities and the subordinated debt indenture and our
obligations under the declaration, including our obligations to pay costs,
expenses, debts and liabilities of the applicable trust, other than with respect
to the trust securities, provides a full and unconditional guarantee of amounts
on the trust preferred securities.

      If we fail to make interest or other payments on the subordinated debt
securities when due, taking account of any extension period, the declaration
provides a mechanism whereby the holders of the trust preferred securities,
using the procedures described in the accompanying prospectus supplement, may
direct the institutional trustee to enforce its rights under the subordinated
debt securities. If the institutional trustee fails to enforce its rights under
the subordinated debt securities, a holder of trust preferred securities may
institute a legal proceeding against us to enforce the institutional trustee's
rights under the subordinated debt securities without first instituting any
legal proceeding against the institutional trustee or any other person or
entity.

      Notwithstanding the above, if an event of default under the declaration
has occurred and is attributable to our failure to pay interest or principal on
the subordinated debt securities on the applicable due date, or, in the case of
redemption, on the redemption date, then a holder of trust preferred securities
may institute a direct action for payment on or after the respective due date
specified in the subordinated debt securities. In connection with such a direct
action, we will be subrogated to the rights of that holder of trust preferred
securities under the declaration to the extent of any payment made by us to that
holder in the direct action.

      We acknowledge, under the guarantee, that the guarantee trustee will
enforce the guarantee on behalf of the holders of the trust preferred
securities. If we fail to make payments under the guarantee, the guarantee
provides a mechanism whereby the holders of the trust preferred securities may
direct the trustee to enforce its rights. Any holder of trust preferred
securities may institute a legal proceeding directly against us to enforce that
trustee's rights under the guarantee without first instituting a legal
proceeding against the applicable trust, that trustee, or any other person or
entity. We and each of the trusts believe that the above mechanisms and
obligations, taken together, provide a full and unconditional guarantee by
Unisys of payments due on the trust preferred securities.

                              PLAN OF DISTRIBUTION

      We and, if applicable, one of the trusts, may sell the offered securities
in and outside the United States (1) through underwriters or dealers, (2)
directly to purchasers, including our affiliates and stockholders, (3) through
agents or (4) through a combination of any of these methods. The prospectus
supplement will include the following information:

      -     the terms of the offering;

      -     the names of any underwriters or agents;

      -     the name or names of any managing underwriter or underwriters;

      -     the purchase price or initial public offering price of the
            securities;

      -     the net proceeds from the sale of the securities;

      -     any delayed delivery arrangements;

      -     any underwriting discounts, commissions and other items constituting
            underwriters' compensation;

      -     any discounts or concessions allowed or reallowed or paid to
            dealers; and

      -     any commissions paid to agents.


                                       26

SALE THROUGH UNDERWRITERS OR DEALERS

      If underwriters are used in the sale, the underwriters will acquire the
securities for their own account. The underwriters may resell the securities
from time to time in one or more transactions, including negotiated
transactions, at a fixed public offering price or at varying prices determined
at the time of sale. Underwriters may offer securities to the public either
through underwriting syndicates represented by one or more managing underwriters
or directly by one or more firms acting as underwriters. Unless we inform you
otherwise in the prospectus supplement, the obligations of the underwriters to
purchase the securities will be subject to certain conditions, and the
underwriters will be obligated to purchase all the offered securities if they
purchase any of them. The underwriters may change from time to time any initial
public offering price and any discounts or concessions allowed or reallowed or
paid to dealers.

      During and after an offering through underwriters, the underwriters may
purchase and sell the securities in the open market. These transactions may
include overallotment and stabilizing transactions and purchases to cover
syndicate short positions created in connection with the offering. The
underwriters may also impose a penalty bid, which means that selling concessions
allowed to syndicate members or other broker-dealers for the offered securities
sold for their account may be reclaimed by the syndicate if the offered
securities are repurchased by the syndicate in stabilizing or covering
transactions. These activities may stabilize, maintain or otherwise affect the
market price of the offered securities, which may be higher than the price that
might otherwise prevail in the open market. If commenced, the underwriters may
discontinue these activities at any time.

      Some or all of the securities that we offer though this prospectus may be
new issues of securities with no established trading market. Any underwriters to
whom we sell our securities for public offering and sale may make a market in
those securities, but they will not be obligated to do so and they may
discontinue any market making at any time without notice. Accordingly, we cannot
assure you of the liquidity of, or continued trading markets for, any securities
that we offer.

      If dealers are used in the sale of securities, we will sell the securities
to them as principals. They may then resell those securities to the public at
varying prices determined by the dealers at the time of resale. We will include
in the prospectus supplement the names of the dealers and the terms of the
transaction.

DIRECT SALES AND SALES THROUGH AGENTS

      We and, if applicable, one of the trusts, may sell the securities
directly. In this case, no underwriters or agents would be involved. We may also
sell the securities through agents designated from time to time. In the
prospectus supplement, we will name any agent involved in the offer or sale of
the offered securities, and we will describe any commissions payable to the
agent. Unless we inform you otherwise in the prospectus supplement, any agent
will agree to use its reasonable best efforts to solicit purchases for the
period of its appointment.

      We may sell the securities directly to institutional investors or others
who may be deemed to be underwriters within the meaning of the Securities Act of
1933 with respect to any sale of those securities. We will describe the terms of
any such sales in the prospectus supplement.

REMARKETING ARRANGEMENTS

      Offered securities may also be offered and sold, if so indicated in the
applicable prospectus supplement, in connection with a remarketing upon their
purchase, in accordance with a redemption or repayment pursuant to their terms,
or otherwise, by one or more remarketing firms, acting as principals for their
own accounts or as agents for us. Any remarketing firm will be identified and
the terms of its agreements, if any, with us and its compensation will be
described in the applicable prospectus supplement. Remarketing firms may be
deemed to be underwriters of the offered securities under the Securities Act of
1933.


                                       27

DELAYED DELIVERY CONTRACTS

      If we so indicate in the prospectus supplement, we may authorize agents,
underwriters or dealers to solicit offers from certain types of institutions to
purchase securities from us or the trusts at the public offering price under
delayed delivery contracts. These contracts would provide for payment and
delivery on a specified date in the future. The contracts would be subject only
to those conditions described in the prospectus supplement. The prospectus
supplement will describe the commission payable for solicitation of those
contracts.

GENERAL INFORMATION

      We may have agreements with the agents, dealers, underwriters and
remarketing firms to indemnify them against certain civil liabilities, including
liabilities under the Securities Act of 1933, and to contribute with respect to
payments that the agents, dealers, underwriters or remarketing firms may be
required to make. We or our affiliates may have commercial relationships with
our agents, underwriters or dealers or their affiliates under which we provide
services to them in the ordinary course of business or they provide services to
us in the ordinary course of business.

                                  LEGAL MATTERS

      Except as otherwise set forth in the applicable prospectus supplement,
certain legal matters in connection with the securities (other than the trust
preferred securities) will be passed upon for Unisys by Nancy Straus Sundheim,
our Senior Vice President, General Counsel and Secretary, and for any agents or
underwriters by Simpson Thacher & Bartlett, New York, New York. Certain matters
of Delaware law relating to the validity of the trust preferred securities will
be passed upon on behalf of the trusts by Morris, Nichols, Arsht & Tunnel,
special Delaware counsel to the trusts. As of the date of this prospectus, Ms.
Sundheim owns 19,358 shares of Unisys common stock and holds options to purchase
301,500 additional shares of Unisys common stock.

                                     EXPERTS

      Ernst & Young LLP, independent auditors, have audited our consolidated
financial statements and schedule included or incorporated by reference in our
Annual Report on Form 10-K for the year ended December 31, 2001, as set forth in
their report, which is incorporated by reference in this prospectus. Our
financial statements and schedule are incorporated by reference in reliance on
Ernst & Young LLP's report given on their authority as experts in accounting and
auditing.

                       WHERE YOU CAN FIND MORE INFORMATION

      We file annual, quarterly and special reports, proxy statements and other
information with the SEC. Our SEC filings are available over the Internet at the
SEC's web site at www.sec.gov. You may also read and copy any document we file
with the SEC at their Public Reference Room located at 450 Fifth Street, N.W.,
Washington, D.C. 20549. You may obtain information on the operation of the
Public Reference Room by calling the SEC at 1-800-SEC-0330 for more information.
You may read and copy reports and other information we file at the office of the
New York Stock Exchange, 20 Broad Street, New York, New York 10005.

      The SEC allows us to "incorporate by reference" the information we file
with them, which means that we can disclose important information to you by
referring you to separate documents. The information incorporated by reference
is considered to be part of this prospectus, and later information filed with
the SEC will update and supersede this information. We incorporate by reference
the documents listed below, and any future filings made with the SEC under
Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, until
the offering of the securities covered by the registration statement of which
this prospectus is a part is completed.

      1.    Our Annual Report on Form 10-K for the year ended December 31, 2001.

      2.    The description of our common stock contained in the registration
            statement of Burroughs Corporation on form 8-B dated May 22, 1984,
            as amended on Form 8 dated May 7, 1991.


                                       28

      3.    The description of the preferred share purchase rights contained in
            the registration statement of Burroughs Corporation on Form 8-A
            dated March 11, 1986, as amended on Forms 8 dated, respectively,
            April 16, 1986, July 8, 1987, and May 7, 1991, on Form 8-A/A dated
            February 26, 1996 and on Form 8-K dated December 7, 2000.

      You may request a copy of these filings, at no cost, by writing or
telephoning us at the following address:

                               Unisys Corporation
                                   Unisys Way
                          Blue Bell, Pennsylvania 19424
                       Attention: Financial Communications
                                 (215) 986-5777

      We have not included any separate financial statements for the trusts.
They were omitted because the trusts are wholly owned subsidiaries of Unisys
Corporation, with no independent operations and we guarantee the obligations
relating to the trust securities. Although the trusts would normally be required
to file information with the SEC on an ongoing basis, we expect the SEC to
exempt the trusts from this filing obligation for as long as we continue to file
our information with the SEC.


                                       29

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

      Unisys Corporation (the "Company") expects to incur the following expenses
in connection with the issuance and distribution of the securities covered by
this Registration Statement:


                                                                                  
         SEC Registration Fee...................................................     $124,200
         Trustees' and Transfer Agents' Fees....................................       50,000
         Printing and Engraving Expenses........................................      100,000
         Rating Agency Fees.....................................................      250,000
         Accounting Fees and Expenses...........................................      100,000
         Blue Sky Fees and Expenses.............................................       20,000
         Legal Fees and Expenses................................................      300,000
         Miscellaneous Expenses.................................................       50,000
                                                                                     --------
           Total................................................................     $994,200


----------

All of the amounts are estimates except for the SEC registration fee.

ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

      Section 145 of the Delaware General Corporation Law (the "DGCL") provides,
among other things:

      -     for permissive indemnification for expenses, judgments, fines and
            amounts paid in settlement actually and reasonably incurred by
            designated persons, including directors and officers of a
            corporation, in the event such persons are parties to litigation
            other than stockholder derivative actions if certain conditions are
            met;

      -     for permissive indemnification for expenses actually and reasonably
            incurred by designated persons, including directors and officers of
            a corporation, in the event such persons are parties to stockholder
            derivative actions if certain conditions are met;

      -     for mandatory indemnification for expenses actually and reasonably
            incurred by designated persons, including directors and officers of
            a corporation, in the event such persons are successful on the
            merits or otherwise in litigation covered by the two preceding
            bullet points; and

      -     that the indemnification provided for by Section 145 shall not be
            deemed exclusive of any other rights which may be provided under any
            by-law, agreement, stockholder or disinterested director vote, or
            otherwise.

      The Company's Certificate of Incorporation provides that a director of the
Company shall not be personally liable to the Company or its stockholders for
monetary damages for breach of fiduciary duty as a director except for liability
(i) for any breach of the director's duty of loyalty to the Company or its
stockholders, (ii) for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii) for paying a
dividend or approving a stock repurchase in violation of Section 174 of the DGCL
or (iv) for any transaction from which the director derived an improper personal
benefit.

      The Certificate of Incorporation also provides that each person who was or
is made a party to, or is involved in, any action, suit or proceeding by reason
of the fact that he or she is or was a director or officer of the Company (or
was serving at the request of the Company as a director, officer, employee or
agent for another entity) shall be indemnified and held harmless by the Company,
to the fullest extent authorized by the DGCL, as in effect (or, to the extent
indemnification is broadened, as it may be amended) against all expense,
liability or loss reasonably incurred by such person in connection therewith.
The Certificate of Incorporation further provides that such rights to
indemnification are contract rights and shall include the right to be paid by
the Company the expenses incurred in defending the proceedings specified above,
in advance of their final disposition, provided that, if the DGCL so


                                      II-1

requires, such payment shall only be made upon delivery to the Company by the
indemnified party of an undertaking to repay all amounts so advanced if it shall
ultimately be determined that the person receiving such payment is not entitled
to be indemnified. Persons so indemnified may bring suit against the Company to
recover unpaid amounts, and if the suit is successful, the Company shall
reimburse the indemnified party for the expense of bringing the suit. The
Certificate of Incorporation provides that the right to indemnification and to
the advance payment of expenses shall not be exclusive of any other right which
any person may have or acquire under any statute, provision of the Company's
Certificate of Incorporation or By-Laws, or otherwise. By resolution effective
September 16, 1986, the Board of Directors extended the right to indemnification
provided directors and officers by the Certificate of Incorporation to employees
of the Company. The Certificate of Incorporation also provides that the Company
may maintain insurance, at its expense, to protect itself and any of its
directors, officers, employees or agents against any expense, liability or loss,
whether or not the Company would have the power to indemnify such person against
such expense, liability or loss under the DGCL.

      On April 28, 1988, at the Company's 1988 Annual Meeting of Stockholders,
the stockholders authorized the Company to enter into indemnification agreements
with its directors, and such indemnification agreements have been executed with
each of the directors of the Company. The indemnification agreements provide
that the Company shall, except in certain situations specified below, indemnify
a director against any expense, liability or loss (including attorneys' fees,
judgments, fines, ERISA excise taxes or penalties and amounts paid in
settlement) incurred by the director in connection with any actual or threatened
action, suit or proceeding (including derivative suits) in which the director
may be involved as a party or otherwise, by reason of the fact that the director
is or was serving in one or more capacities as a director or officer of the
Company or, at the request of the Company, as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust, employee
benefit plan or other entity or enterprise.

      The indemnification agreements require indemnification except to the
extent (i) payment for any liability is made under an insurance policy provided
by the Company, (ii) indemnification is provided by the Company under the
Certificate of Incorporation or By-Laws, the DGCL or otherwise than pursuant to
the indemnification agreement, (iii) the liability is based upon or attributable
to the director gaining any personal pecuniary profit to which such director is
not legally entitled or is determined to result from the director's knowingly
fraudulent, dishonest or willful misconduct, (iv) the liability arises out of
the violation of certain provisions of the Securities Exchange Act of 1934 or
(v) indemnification has been determined not to be permitted by applicable law.

      The indemnification agreements further provide that, in the event of a
Potential Change in Control (as defined therein), the Company shall cause to be
maintained any then existing policies of directors' and officers' liability
insurance for a period of six years from the date of a Change in Control (as
defined therein) with coverage at least comparable to and in the same amounts as
that provided by such policies in effect immediately prior to such Potential
Change in Control. In the event of a Potential Change in Control, the
indemnification agreements also provide for the establishment by the Company of
a trust, for the benefit of each director, upon the written request by the
director. The trust shall be funded by the Company in amounts sufficient to
satisfy any and all liabilities reasonably anticipated at the time of such
request, as agreed upon by the director and the Company.

      The indemnification agreements also provide that no legal actions may be
brought by or on behalf of the Company, or any affiliate of the Company, against
a director after the expiration of two years from the date of accrual of such
cause of action, and that any claim or cause of action of the Company or its
affiliate shall be extinguished and deemed released unless asserted by the
timely filing of a legal action within such two year period.

      The directors and officers of the Company are insured against certain
civil liabilities, including liabilities under federal securities laws, which
might be incurred by them in such capacity.

ITEM 16. EXHIBITS.

      See the attached Exhibit Index.


                                       II-2

ITEM 17. UNDERTAKINGS.

      The undersigned registrants hereby undertake:

      (1)   To file, during any period in which offers or sales are being made,
            a post-effective amendment to this registration statement:

            (i)   To include any prospectus required by Section 10(a)(3) of the
                  Securities Act of 1933 (the "Securities Act"), unless the
                  information required to be included in such post-effective
                  amendment is contained in a periodic report filed by the
                  registrant pursuant to Section 13 or Section 15(d) of the
                  Securities Exchange Act of 1934 (the "Exchange Act") and
                  incorporated herein by reference;

            (ii)  To reflect in the prospectus any facts or events arising after
                  the effective date of the registration statement (or the most
                  recent post-effective amendment thereof) which, individually
                  or in the aggregate, represent a fundamental change in the
                  information set forth in the registration statement, unless
                  the information required to be included in such post-effective
                  amendment is contained in a periodic report filed by the
                  registrant pursuant to Section 13 or Section 15(d) of the
                  Exchange Act and incorporated herein by reference;

            (iii) To include any material information with respect to the plan
                  of distribution not previously disclosed in the registration
                  statement or any material change to such information in the
                  registration statement;

      (2)   That, for the purpose of determining any liability under the
            Securities Act, each such post-effective amendment shall be deemed
            to be a new registration statement relating to the securities
            offered therein, and the offering of such securities at that time
            shall be deemed to be the initial bona fide offering thereof;

      (3)   To remove from registration by means of a post-effective amendment
            any of the securities being registered which remain unsold at the
            termination of the offering;

      (4)   That, for purposes of determining any liability under the Securities
            Act, each filing of the Company's annual report pursuant to Section
            13(a) or Section 15(d) of the Exchange Act that is incorporated by
            reference in the registration statement shall be deemed to be a new
            registration statement relating to the securities offered therein,
            and the offering of such securities at that time shall be deemed to
            be the initial bona fide offering thereof;

      (5)   That, for purposes of determining any liability under the Securities
            Act, the information omitted from the form of prospectus filed as
            part of this Registration Statement in reliance upon Rule 430A and
            contained in the form of prospectus filed by the registrant pursuant
            to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be
            deemed to be part of this registration statement as of the time it
            was declared effective; and

      (6)   That, for the purpose of determining any liability under the
            Securities Act, each post-effective amendment that contains a form
            of prospectus shall be deemed to be a new registration statement
            relating to the securities offered therein, and the offering of such
            securities at that time shall be deemed to be the initial bona fide
            offering thereof.

      Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
registrants pursuant to the provisions described in Item 15 above, or otherwise,
the registrants have been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Securities Act and is, therefore, unenforceable. In the event a claim for
indemnification against such liabilities (other than the payment by the
registrants of expenses incurred or paid by a director, officer or controlling
person of the registrants in the successful defense of any action, suit or
proceeding) is asserted against the registrants by such director, officer or
controlling person in connection with the securities being registered, the
registrants will, unless in the opinion of their counsel the matter has been


                                       II-3

settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by them is against public policy as
expressed in the Securities Act and will be governed by the final adjudication
of such issue.


                                      II-4

                                   SIGNATURES

      Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the Township of Whitpain, Commonwealth of Pennsylvania, on April
3, 2002.

                                      UNISYS CORPORATION

                                      BY:      /s/ LAWRENCE A. WEINBACH
                                        ----------------------------------------
                                                   LAWRENCE A. WEINBACH
                                                  CHAIRMAN, PRESIDENT AND
                                                  CHIEF EXECUTIVE OFFICER

                                POWER OF ATTORNEY

      Each person whose individual signature appears below hereby authorizes
Lawrence A. Weinbach, Janet M. Brutschea Haugen, Nancy Straus Sundheim and Scott
A. Battersby, and each of them, with full power of substitution and full power
to act without the other, his or her true and lawful attorney-in-fact and agent
in his or her name, place and stead, to execute in the name and on behalf of
such person, individually and in each capacity stated below, any and all
amendments (including post-effective amendments) to this Registration Statement,
any registration statements on Form 462(b) and all documents relating thereto,
and to file the same, with all exhibits thereto and other documents in
connection therewith, with the Securities and Exchange Commission, and generally
to do all such things in his or her name and on his or her behalf in his or her
respective capacities as officers or directors of Unisys Corporation to comply
with the provisions of the Securities Act of 1933, as amended, and all
requirements of the Securities and Exchange Commission.

      Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on April 3, 2002.



                        Signature                                                       Title
                        ---------                                                       -----
                                                              
                 /S/ LAWRENCE A. WEINBACH                              Chairman, President and Chief Executive
-----------------------------------------------------------          Officer (principal executive officer) and
                   LAWRENCE A. WEINBACH                                                Director

              /S/ JANET M. BRUTSCHEA HAUGEN                       Senior Vice President and Chief Financial Officer
-----------------------------------------------------------                 (principal financial officer)
                JANET M. BRUTSCHEA HAUGEN

                  /S/ CAROL S. SABOCHICK                               Vice President and Controller (principal
-----------------------------------------------------------                         accounting officer)
                    CAROL S. SABOCHICK



                                      II-5


                                                                                    
                     /S/ J.P. BOLDUC                                                   Director
-----------------------------------------------------------
                       J.P. BOLDUC

                 /S/ JAMES J. DUDERSTADT                                               Director
-----------------------------------------------------------
                   JAMES J. DUDERSTADT

                   /S/ HENRY C. DUQUES                                                 Director
-----------------------------------------------------------
                     HENRY C. DUQUES

                  /S/ DENISE K. FLETCHER                                               Director
-----------------------------------------------------------
                    DENISE K. FLETCHER

                    /S/ GAIL D. FOSLER                                                 Director
-----------------------------------------------------------
                      GAIL D. FOSLER

                   /S/ MELVIN R. GOODES                                                Director
-----------------------------------------------------------
                     MELVIN R. GOODES

                   /S/ EDWIN A. HUSTON                                                 Director
-----------------------------------------------------------
                     EDWIN A. HUSTON

                   /S/ KENNETH A. MACKE                                                Director
-----------------------------------------------------------
                     KENNETH A. MACKE

                  /S/ THEODORE E. MARTIN                                               Director
-----------------------------------------------------------
                    THEODORE E. MARTIN



                                      II-6

                                   SIGNATURES

      Pursuant to the requirements of the Securities Act of 1933, Unisys Capital
Trust I and Unisys Capital Trust II certify that they have reasonable grounds to
believe that they meet all of the requirements for filing on Form S-3 and have
caused this registration statement to be signed on their behalf by the
undersigned, thereunto duly authorized, in the City of Wilmington, State of
Delaware, on March 27, 2002.

                                           UNISYS CAPITAL TRUST I

                                           By:  /s/ Robert S. Manturuk
                                                --------------------------------
                                               Robert S. Manturuk, Trustee

                                           By:  /s/ Nancy L. Miller
                                                --------------------------------
                                               Nancy L. Miller, Trustee

                                           By:  /s/ Peter S. Noll
                                                --------------------------------
                                               Peter S. Noll, Trustee

                                           UNISYS CAPITAL TRUST II

                                           By:  /s/ Robert S. Manturuk
                                                --------------------------------
                                               Robert S. Manturuk, Trustee

                                           By:  /s/ Nancy L. Miller
                                                --------------------------------
                                               Nancy L. Miller, Trustee

                                           By:  /s/ Peter S. Noll
                                                --------------------------------
                                               Peter S. Noll, Trustee


                                      II-7

                                  EXHIBIT INDEX



Exhibit
Number                          Document Description
------                          --------------------
      
1.1*     Form of Underwriting Agreement Basic Provisions (with forms of Terms
         Agreement for Debt Securities, Common Stock and Preferred Stock
         attached)

1.2**    Form of Underwriting Agreement (Preferred Securities of the Trusts)

1.3**    Form of Underwriting Agreement (Warrants)

1.4**    Form of Underwriting Agreement (Stock Purchase Contracts)

1.5**    Form of Underwriting Agreement (Stock Purchase Units)

1.6**    Form of Agency Agreement

4.1*     Form of Senior Indenture

4.2*     Form of Subordinated Indenture

4.3      Restated Certificate of Incorporation of Unisys Corporation
         (incorporated by reference to Exhibit 3.1 to Unisys Corporation's
         Quarterly Report on Form 10-Q for the quarterly period ended September
         30, 1999)

4.4      By-Laws of Unisys Corporation (incorporated by reference to Exhibit 3.3
         to Unisys Corporation's Annual Report on Form 10-K for the fiscal year
         ended December 31, 2001)

4.5      Form of Rights Agreement dated as of March 7, 1986, which includes as
         Exhibit A, the Certificate of Designations for the Junior Participating
         Preferred Stock, and as Exhibit B, the Form of Rights Certificate
         (incorporated by reference to Exhibit 1 to Unisys Corporation's
         Registration Statement on Form 8-A, dated March 11, 1986)

4.6      Amendment No. 1 to Rights Agreement dated as of February 22, 1996
         (incorporated by reference to Exhibit 4 to Unisys Corporation's Current
         Report on Form 8-K dated February 22, 1996)

4.7      Amendment No. 2 to Rights Agreement dated as of December 7, 2000
         (incorporated by reference to Exhibit 4 to Unisys Corporation's Current
         Report on Form 8-K dated December 7, 2000)

4.8**    Form of Certificate of Designations with respect to preferred stock of
         Unisys Corporation

4.9**    Form of Warrant Agreement

4.10**   Form of Stock Purchase Contract

4.11**   Form of Stock Purchase Unit

4.12**   Form of Pledge Agreement with respect to Stock Purchase Contracts and
         Stock Purchase Units


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*  Filed herewith.
** To be filed either by amendment or as an exhibit to a report filed under the
Securities Exchange Act of 1934 and incorporated herein by reference.


      
4.13*    Certificate of Trust of Unisys Capital Trust I

4.14*    Certificate of Trust of Unisys Capital Trust II

4.15*    Declaration of Trust of Unisys Capital Trust I

4.16*    Declaration of Trust of Unisys Capital Trust II

4.17*    Form of Amended and Restated Declaration of Trust for Unisys Capital
         Trust I and Unisys Capital Trust II

4.18     Form of Trust Preferred Security (included in Exhibit 4.17)

4.19*    Form of Guarantee with respect to Trust Preferred Securities

5.1*     Opinion of Nancy Straus Sundheim, Senior Vice President, General
         Counsel and Secretary of Unisys Corporation, as to the validity of the
         debt securities, common stock, preferred stock, warrants, stock
         purchase contracts, stock purchase units and guarantees

5.2*     Opinion of Morris, Nichols, Arsht & Tunnell as to the validity of the
         preferred securities of each of Unisys Capital Trust I and Unisys
         Capital Trust II

12.1*    Statement of Computation of Ratio of Earnings to Fixed Charges

12.2*    Statement of Computation of Ratio of Earnings to Combined Fixed Charges
         and Preferred Stock Dividends

23.1*    Consent of Ernst & Young LLP (independent auditors)

23.2     Consent of Nancy Straus Sundheim (included in Exhibit 5.1)

23.3     Consent of Morris, Nichols, Arsht & Tunnell (included in Exhibit 5.2)

24       Power of Attorney (included on pages II-5 and II-6 of this Registration
         Statement)

25.1*    Statement of Eligibility on Form T-1 of HSBC Bank USA, as Trustee under
         Senior Indenture

25.2*    Statement of Eligibility on Form T-1 of HSBC Bank USA, as Trustee under
         Subordinated Indenture

25.3*    Statement of Eligibility on Form T-1 of HSBC Bank USA, as Property
         Trustee under Amended and Restated Declaration of Trust of Unisys
         Capital Trust I

25.4*    Statement of Eligibility on Form T-1 of HSBC Bank USA, as Property
         Trustee under Amended and Restated Declaration of Trust of Unisys
         Capital Trust II

25.5*    Statement of Eligibility on Form T-1 of HSBC Bank USA, as Guarantee
         Trustee under Guarantee with respect to Unisys Capital Trust I

25.6*    Statement of Eligibility on Form T-1 of HSBC Bank USA, as Guarantee
         Trustee under Guarantee with respect to Unisys Capital Trust II


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*  Filed herewith.