EXHIBIT B
                                                         TO THE MERGER AGREEMENT


                                VOTING AGREEMENT

            VOTING   AGREEMENT,   dated  as  of  June  14,  1999  (this  "Voting
Agreement"),   by  and  between  Unisys  Corporation,   a  Delaware  corporation
("Parent"),    and    ___________________________________,    a   ______________
("Shareholder").

            WHEREAS, Parent, Pulsepoint Communications, a California corporation
(the "Company"),  and Shellco Inc., a newly-formed  California corporation and a
      -------
direct, wholly-owned subsidiary of Parent ("Merger Sub"), have contemporaneously
                                            ----------
with the execution of this Voting  Agreement  entered into an Agreement and Plan
of  Merger of even  date  herewith  (as may be  amended  from time to time,  the
"Merger Agreement") which provides, among other things, that Merger Sub shall be
 ----------------
merged  (the  "Merger")  with and into the  Company  pursuant  to the  terms and
               ------
conditions thereof;

            WHEREAS, as an essential condition and inducement to Parent to enter
into  the  Merger  Agreement  and in  consideration  therefor,  the  undersigned
Shareholder and Parent have agreed to enter into this Voting Agreement; and

            WHEREAS,  as of the date  hereof,  Shareholder  owns of  record  and
beneficially  the shares of common  stock,  no par value,  of the  Company  (the
"Company Common Stock") and the shares of series B convertible  preferred stock,
 --------------------
no par value, of the Company (the "Preferred  Stock" and  collectively  with the
Company  Common  Stock,  the  "Company  Stock") set forth  opposite  its name on
                               --------------
Schedule A hereto and desires to enter into this  Agreement with respect to such
- ----------
shares of Company Stock.

            NOW,  THEREFORE,  in  consideration  of the foregoing and the mutual
covenants and agreements  contained herein and in the Merger Agreement,  and for
other good and valuable consideration,  the receipt and sufficiency of which are
hereby  acknowledged,  and  intending to be legally  bound  hereby,  the parties
hereto hereby agree as follows:

                                    ARTICLE I
                                VOTING OF SHARES

            Section 1.1 Voting  Agreement.  Shareholder  hereby   agrees  to (a)
                        -----------------
appear, or cause the holder of record on any applicable record date (the "Record
                                                                          ------
Holder")  to  appear,  for the  purpose of  obtaining  a quorum at any annual or
- ------
special meeting of shareholders of the Company and at any adjournment thereof at
which matters  relating to the Merger,  the Merger  Agreement or any transaction
contemplated  thereby are considered and (b) vote, or cause the Record Holder to
vote,  in person or by proxy,  all of the shares of the  Company  Stock owned by
Shareholder,  or with  respect to which such  Shareholder  has or shares  voting
power or control,  and all of the shares of Company  Stock which shall,  or with
respect to which  voting power or control  shall,  hereafter be acquired by such
Shareholder  (collectively,  the  "Shares")  in favor of the Merger,  the Merger
                                   ------
Agreement and the  transactions  contemplated  by the Merger  Agreement (in each
case as provided for in the Merger Agreement as in effect on the date hereof and
including  amendments  thereto  that do not effect a change to the  transactions
contemplated  thereby as of the date hereof that would  materially and adversely
affect the Shareholder).





            Section 1.2. Irrevocable  Proxy.   As   security  for  Shareholder's
                         ------------------
obligations under Section 1.1 hereof, Shareholder hereby irrevocably constitutes
and  appoints  Parent as his or its attorney  and proxy in  accordance  with the
provisions of Sections 705 and 706 of the California  General  Corporation  Law,
with full power of substitution  and  resubstitution,  to vote the Shares at any
annual or special meeting of shareholders of the Company, however called, as and
to the extent provided in clauses (a) and (b) of Section 1.1 hereof.  THIS PROXY
AND POWER OF ATTORNEY IS IRREVOCABLE  AND COUPLED WITH AN INTEREST.  Shareholder
hereby  revokes all other  proxies and powers of attorney with respect to his or
its  Shares  that he or it may have  heretofore  appointed  or  granted,  and no
subsequent  proxy or power of attorney  shall be granted (and if granted,  shall
not be effective) by Shareholder with respect  thereto,  other than for the sole
purpose of voting the Shares as contemplated by Section 1.1 hereof.

            Section 1.3 No Ownership Interest.  Nothing contained in this Voting
                        ---------------------
Agreement shall be deemed to vest in Parent any direct or indirect  ownership or
incidence of ownership of or with respect to any Shares.  All rights,  ownership
and  economic  benefits of and relating to the Shares shall remain and belong to
Shareholder,  and Parent shall have no authority to manage, direct, superintend,
restrict,  regulate,  govern, or administer any of the policies or operations of
the Company or exercise  any power or  authority  to direct  Shareholder  in the
voting  of any of the  Shares,  except  as  otherwise  provided  herein,  or the
performance of Shareholder's  duties or responsibilities as a shareholder of the
Company.

            Section 1.4 No Inconsistent Agreements. Shareholder hereby covenants
                        --------------------------
and agrees that,  except as contemplated by this Voting Agreement and the Merger
Agreement,  Shareholder  (a) has not  entered,  and  shall not enter at any time
while this Voting  Agreement  remains in effect,  into a voting  agreement  with
respect to the Shares;  (b) has not  deposited and shall not deposit at any time
while this Voting Agreement  remains in effect,  any Shares into a voting trust;
(c) has not granted, and shall not grant at any time while this Voting Agreement
remains in effect, a proxy, power of attorney or other authorization or consent,
in any case set out in  paragraphs  (a) through (c) which is  inconsistent  with
this  Voting  Agreement;  and (d) shall not take any action  that would make any
representation  or warranty of Shareholder  contained herein untrue or incorrect
or have the effect of preventing or disabling Shareholder from performing his or
its obligations under this Voting Agreement.

                                   ARTICLE II
                              TRANSFER; CONVERSION

            Section 2.1 Transfer of Title.
                        -----------------

            (a)   Shareholder  hereby covenants and agrees that such Shareholder
will not, except as provided in Section 2.2 hereof,  prior to the termination of
this Voting Agreement,  either directly or indirectly,  offer or otherwise agree
to sell, assign, pledge,  hypothecate,  transfer,  exchange,  convert or dispose
("Transfer")  of  any  Shares  or  options  to  purchase  Company  Common  Stock
  --------
("Options") or any other  securities or rights  convertible into or exchangeable
  -------
for shares of Company  Common  Stock,  owned either  directly or  indirectly  by
Shareholder or with respect to which  Shareholder  has the power of disposition,
whether now or hereafter  acquired,


                                     - 2 -



without the prior written consent of Parent (provided  nothing  contained herein
will be deemed to restrict the  exercise of Options),  unless the Person to whom
Shares or Options have been sold, assigned, pledged, hypothecated,  transferred,
exchanged or disposed agrees to be bound by this Voting  Agreement as if a party
hereto.

            (b)   Shareholder  hereby agrees and  consents  to the entry of stop
transfer  instructions  by the  Company  against  the  transfer  of  any  Shares
inconsistent with the terms of Section 2.1(a) or the Section 2.2 hereof.

            Section 2.2 Conversion.  (a) Shareholder  hereby agrees that it will
                        ----------
not  convert  any shares of  Preferred  Stock held by it during the term of this
Voting Agreement except as follows:  (i) such shares of Preferred Stock shall be
converted in accordance  with the provisions of the letter from the  undersigned
dated as of the date hereof to Unisys Corporation and PulsePoint  Communications
(the  "Letter  Agreement")  and (ii)  such  shares  of  Preferred  Stock  may be
converted at any time in an automatic conversion pursuant to Section 4(l)(2) and
(3) of the  Company's  Certificate  of  Determination  of  Rights,  Preferences,
Privileges and Restriction of the Preferred Stock (a "Forced Conversion").

            (b)  Shareholder  hereby agrees to cause a Forced  Conversion of all
shares of Preferred  Stock held by all holders  thereof,  such  conversion to be
effective  immediately upon approval of the Merger by the holders of the Company
Common  Stock and the  holders  of the  Preferred  Stock at the  meeting  of the
shareholders of the Company called in connection with the Merger. Promptly after
the date hereof,  Shareholder shall execute a conversion letter substantially in
the form of the letter  attached  hereto as Exhibit  I, and shall  deliver  such
letter to the Company along with stock certificates and such other documents and
instruments  as may be  necessary  to effect such  conversion  under this Voting
Agreement and the Letter  Agreement,  such documents to be held in escrow by the
Company until satisfaction of conditions precedent hereunder or under the Letter
Agreement, as the case may be.

                                   ARTICLE III
                         REPRESENTATIONS AND WARRANTIES
                                 OF SHAREHOLDER

            Shareholder hereby represents and warrants to Parent as follows:

            Section 3.1 Authority  Relative To This  Agreement.  Shareholder  is
                        --------------------------------------
competent to execute and deliver this Voting Agreement and the Letter Agreement,
to  perform  its  obligations  hereunder  and  to  consummate  the  transactions
contemplated  hereby.  The execution and delivery of this Voting Agreement,  the
Letter Agreement and the consummation of the  transactions  contemplated  hereby
have been duly and validly  authorized  by all  necessary  action on the part of
Shareholder,  and no other  proceedings on the part of Shareholder are necessary
to authorize this Voting  Agreement,  the Letter  Agreement or to consummate the
transactions  contemplated  hereby. Each of this Voting Agreement and the Letter
Agreement has been duly and validly  executed and delivered by Shareholder  and,
assuming the due  authorization,  execution  and  delivery by all other  parties
thereto,  constitutes  a legal,  valid and binding  obligation  of  Shareholder,
enforceable against such Shareholder in accordance with its terms.


                                     - 3 -



            Section 3.2 No Conflict.  No authorization,  consent or approval of,
                        -----------
or filing with,  any court or any public body or authority is necessary  for the
consummation  by Shareholder  of the  transactions  contemplated  by this Voting
Agreement  and the Letter  Agreement.  The execution and delivery of this Voting
Agreement and the Letter  Agreement by Shareholder does not, and the performance
of this Voting  Agreement  and the Letter  Agreement by  Shareholder  shall not,
result in any breach of or constitute a default (or an event that with notice or
lapse of time or both  would  become a  default)  under,  or give to others  any
rights of termination,  amendment, acceleration or cancellation of, or result in
the creation of a lien or encumbrance on, any of the Shares or Options  pursuant
to, any note, bond, mortgage,  indenture,  contract,  agreement, lease, license,
permit,  franchise or other  instrument or obligation to which  Shareholder is a
party or by which Shareholder or the Shares or Options are bound or affected.

            Section 3.3 Title to the  Shares.  The Shares and  Options  held by
                        --------------------
Shareholder are owned free and clear of all security interests,  liens,  claims,
pledges,   options,  rights  of  first  refusal,   agreements,   limitations  on
Shareholder's  voting  rights,  charges  and other  encumbrances  of any  nature
whatsoever,  and  Shareholder  has not  appointed  or granted  any proxy,  which
appointment or grant remains effective, with respect to the Shares.

                                   ARTICLE IV
                                CERTAIN COVENANTS

            Section 4.1 No  Solicitation.  From  the  date  hereof  until  the
                        ----------------
Effective  Time (as  defined  in the  Merger  Agreement)  or,  if  earlier,  the
termination of the Merger Agreement,  Shareholder shall not (whether directly or
indirectly  through  advisors,  agents  or other  intermediaries)  (a)  solicit,
initiate or encourage any Company  Acquisition  Proposal (as also so defined) or
(b) engage in  discussions  or  negotiations  with,  or disclose any  non-public
information  relating to the Company or its Subsidiaries to, any Person (as also
so  defined)  that  has  made a  Company  Acquisition  Proposal  or has  advised
Shareholder,  or to his knowledge,  any other  shareholder of the Company,  that
such Person is interested in making a Company Acquisition Proposal.

            Section 4.2 Termination.   This  Agreement  shall   automatically
                        -----------
terminate  upon  the  earlier  to  occur of (a) the  termination  of the  Merger
Agreement in  accordance  with its terms or (b) the  Effective  Time.  Upon such
termination,  no  party  shall  have  any  further  obligations  or  liabilities
hereunder,  provided that no such  termination  shall relieve  either party from
liability for any breach of this Voting  Agreement or the Letter Agreement prior
to such termination.

                                    ARTICLE V
                                  MISCELLANEOUS

            Section 5.1 Enforcement of Agreement.  The parties hereto agree that
                        ------------------------
irreparable  damage would occur in the event that any of the  provisions of this
Voting  Agreement were not performed in accordance  with its specified  terms or
were  otherwise  breached.  It is  accordingly  agreed that the parties shall be
entitled to an  injunction  or  injunctions  to prevent  breaches of this Voting
Agreement  and to specific  performance  of the terms and  provisions  hereof in
addition to any other remedy to which they are entitled at law or in equity.


                                     - 4 -



            Section 5.2 Successors and Affiliates; No Third Party Beneficiaries.
                        -------------------------------------------------------
Except  pursuant to a Transfer  permitted  by Section 2.1 hereof,  neither  this
Voting Agreement nor any of the rights, interests or obligations hereunder shall
be  assigned  by any of the  parties  hereto  (whether  by  operation  of law or
otherwise) without the prior written consent of the other party.  Subject to the
preceding  sentence,  this Voting Agreement and the Letter Agreement shall inure
to the  benefit  of and  shall be  binding  upon the  parties  hereto  and their
respective heirs, legal  representatives  and permitted assigns.  If Shareholder
shall at any time hereafter  acquire  ownership of, or voting power with respect
to, any additional Shares in any manner, by operation of law or otherwise,  such
Shares shall be held subject to all of the terms and  provisions  of this Voting
Agreement and the Letter Agreement. Without limiting the foregoing,  Shareholder
specifically  agrees that the obligations of Shareholder  hereunder shall not be
terminated by operation of law, whether by death or incapacity of Shareholder or
otherwise.

            Section 5.3 Entire Agreement.  This Voting Agreement,  together with
                        ----------------
the Letter  Agreement  and the  Affiliate  Agreement  (as  defined in the Merger
Agreement),  if and to the extent  entered into by the  Shareholder  and Parent,
constitute the entire agreement among Parent and Shareholder with respect to the
subject  matter hereof and supersede all prior  agreements  and  understandings,
both written and oral,  among Parent and Shareholder with respect to the subject
matter hereof.

            Section 5.4 Captions and  Counterparts.  The captions in this Voting
                        --------------------------
Agreement  are for  convenience  only and shall not be  considered  a part of or
affect the  construction  of  interpretation  of any  provision  of this  Voting
Agreement.  This Voting Agreement may be executed in several counterparts,  each
of which shall  constitute  one in the same  instrument.  Each  counterpart  may
consist of a number of copies  hereof each signed by less than all, but together
signed by all of the parties hereto.

            Section 5.5 Amendment.  This Voting  Agreement  may not be amended
                        ---------
except by an instrument in writing signed by the parties hereto.

            Section 5.6 Waivers. Except as provided in this Voting Agreement, no
                        -------
action taken pursuant to this Voting Agreement, including without limitation any
investigation  by or on behalf of any  party,  shall be deemed to  constitute  a
waiver by the party taking such action of compliance  with any  representations,
warranties,  covenants or  agreements  contained in this Voting  Agreement.  The
waiver by any party  hereto of a breach  of any  provision  hereunder  shall not
operate or be  construed  as a wavier of any prior or  subsequent  breach of the
same or any other provision hereunder.

            Section 5.7 Severability.  If  any term or other  provision  of this
                        ------------
Voting Agreement is invalid,  illegal or incapable of being enforced by any rule
of law, or public  policy,  all other  conditions  and provisions of this Voting
Agreement  shall  nevertheless  remain  in full  force  and  effect.  Upon  such
determination that any term or other provision is invalid,  illegal or incapable
of being  enforced,  the parties hereto shall  negotiate in good faith to modify
this  Voting  Agreement  so as to effect the  original  intent of the parties as
closely as possible to the  fullest


                                     - 5 -



extent permitted by applicable law in a mutually acceptable manner in order that
the terms of this Voting  Agreement  remain as  originally  contemplated  to the
fullest extent possible.

            Section 5.8 Notices.  All notices and other  communications given or
                        -------
made  pursuant  hereto shall be in writing and shall be deemed to have been duly
given or made and shall be effective upon receipt, if delivered personally, upon
receipt of a transmission  confirmation  if sent by facsimile (with a confirming
copy sent by overnight  courier) and on the next business day if sent by Federal
Express,  United  Parcel  Service,  Express  Mail or other  reputable  overnight
courier to the parties at the following  addresses (or at such other address for
a party as shall be specified by notice):

            If to Shareholder:

            ________________________
            ________________________
            ________________________
            Attn:       ____________
            Telephone:  ____________
            Facsimile:  ____________

            With a copy to:

            ________________________
            ________________________
            ________________________
            Attn:       ____________
            Telephone:  ____________
            Facsimile:  ____________


            If to Parent:

            Unisys Corporation
            Unisys Way
            Blue Bell, Pennsylvania  19424
            Attention:    General Counsel
            Telecopy No.: (215) 986-0624

            with a copy to:

            Fried, Frank, Harris, Shriver & Jacobson
            One New York Plaza
            New York, New York, 10004
            Attention:  Arthur Fleischer, Jr.
                        Charles Nathan
            Telephone:  (212) 859-8000
            Facsimile:  (212) 859-4000


                                     - 6 -



            Section 5.9 Governing Law. This Voting  Agreement  shall be governed
                        -------------
by,  and  construed  in  accordance  with,  the laws of the  State  of  Delaware
regardless of the laws that might otherwise govern under  applicable  principles
of conflicts of law.

            Section 5.10 Jurisdiction.  Each of the parties  hereto (i) consents
                         ------------
to submit  itself to the personal  jurisdiction  of any Federal Court located in
the State of  Delaware  or any  Delaware  State  Court in the event any  dispute
arises out of this Voting Agreement or any of the  transactions  contemplated by
this Voting  Agreement;  (ii) agrees that it shall not attempt to deny or defeat
such  personal  jurisdiction  by motion or other request for leave from any such
Court,  and (iii)  agrees  that it shall not bring any action  relating  to this
Voting  Agreement  or  any of  the  transactions  contemplated  by  this  Voting
Agreement  in any Court  other  than a  Federal  Court  sitting  in the State of
Delaware or a Delaware State Court.

            IN WITNESS  WHEREOF,  each of the  parties  hereto  have caused this
Voting Agreement to be duly executed as of the date first written above.

                                    UNISYS CORPORATION


                                    By:____________________________
                                    Name:__________________________
                                    Title:_________________________



                                    SHAREHOLDER


                                    By:____________________________
                                    Name:__________________________
                                    Title:_________________________


                                     - 7 -



                                   SCHEDULE A


Shareholder Name Company Common Stock Held Company Series B Preferred Stock Held
- ---------------- ------------------------- -------------------------------------


                                     - 8 -



                                    EXHIBIT I

                            FORM OF CONVERSION LETTER

                                                                          [date]


PulsePoint Communications
6307 Carpinteria Avenue
Carpinteria, California 93013
Attn: Secretary

            RE:   Series B Convertible Preferred Stock of PulsePoint
                  Communications (the "Company") -- Automatic Conversion
                  ------------------------------------------------------


Ladies and Gentlemen:

            This letter is being  delivered to you in connection with the Voting
Agreements  dated as of June __, 1999 by and among each of the  undersigned  and
Unisys  Corporation.   The  undersigned  hold  shares  of  the  above-referenced
Preferred  Stock  (the  "Preferred  Stock")  in excess of fifty  percent  of the
outstanding shares of such Preferred Stock.

            Notice  is  hereby  given   pursuant  to  Section   4(l)(2)  of  the
Certificate of Determination of Rights, Preferences, Privileges and Restrictions
of Series B  Convertible  Preferred  Stock of the Company  that the  undersigned
shall cause an automatic  conversion of all shares of Preferred Stock under such
Section,  such conversion to be effective immediately upon the occurrence of the
approval of the Merger defined below by the  shareholders  of the Company at the
shareholder's  meeting called by the Company to approve the Merger. No automatic
conversion  shall be deemed to have  occurred  until such time as the  foregoing
condition has occurred.

            The term  "Merger"  means the merger of Shellco Inc., a wholly owned
subsidiary of Unisys  Corporation,  with and into the Company as contemplated by
the  Agreement and Plan of Merger dated as of June __, 1999 by and among Unisys,
Shellco Inc. and the Company.


                                      - 1 -



            This  letter may be executed  in one or more  counterparts,  each of
which shall constitute one and the same instrument. Each counterpart may consist
of a number of copies hereof signed by less than all, but together signed by all
the parties hereto.



                                             Sincerely,



                                      - 2 -



                                                                       EXHIBIT C
                                                         TO THE MERGER AGREEMENT


                            ARTICLES OF INCORPORATION
                                       OF
                                  SHELLCO INC.

                                      Name
                                      ----

      One:  The name of the corporation is: SHELLCO INC.

                                     Purpose
                                     -------

      Two:  The  purpose of this  corporation  is to engage in any lawful act or
 activity for which a corporation may be organized under the General Corporation
 Law of California other than the banking  business,  the trust company business
 or the practice of a profession  permitted to be incorporated by the California
 Corporations Code.

                                Agent for Service
                                -----------------

      Three: The name of this corporation's initial agent for service of process
 is CT Corporation  System, 818 West Seventh Street, 2nd Floor, Los Angeles,  CA
 90017.

                                Authorized Shares
                                -----------------

      Four:  This corporation is authorized to issue only one class of shares of
 stock;  and the total number of shares which this  corporation is authorized to
 issue is one thousand (1,000) shares of common stock, no par value.

                               Director Liability
                               ------------------

      Five:  The  liability of the directors of  the  corporation  for  monetary
 damages  shall   be  eliminated  to  the  fullest  extent   permissible   under
 California law.

                            Indemnification of Agents
                            -------------------------

      Six: This corporation is authorized to provide  indemnification  of agents
 (as defined in Section 317 of the California  Corporations  Code) through bylaw
 provisions,  agreements  with agents,  vote of  shareholders  or  disinterested
 directors or otherwise, in excess of the indemnification otherwise permitted by
 Section 317 of the California Corporations Code, subject only to the applicable
 limits  set  forth in  Section  204 of the  California  Corporations  Code with
 respect to actions for breach of duty to the corporation and its shareholders.

 Date:  June 11, 1999.

                                          ______________________________
                                          Anna Czege
                                          Incorporator





                                                                       EXHIBIT D
                                                         TO THE MERGER AGREEMENT




                        FORM OF COMPANY AFFILIATE LETTER
                        --------------------------------


                                                           ______________, _____

Unisys Corporation
Unisys Way
Blue Bell, Pennsylvania 19424
Attention: General Counsel

PulsePoint Communications
6307 Carpinteria Avenue
Carpinteria, California  93013

Ladies and Gentlemen:

      The  undersigned,  [each] a holder of shares of common stock, no par value
per share (the "Company  Common  Stock") and shares of preferred  stock,  no par
                ----------------------
value per  share  (the  "Preferred  Stock"),  of  PulsePoint  Communications,  a
                         ----------------
California  corporation  (the  "Company"),  has been advised that as of the date
                                -------
hereof,  the undersigned  may be deemed to be an "affiliate" of the Company,  as
the term  "affiliate"  is (i) defined for purposes of paragraphs  (c) and (d) of
Rule 145 of the Rules and Regulations of the Securities and Exchange  Commission
(the  "Commission")  and/or (ii) used in and for purposes of  Accounting  Series
       ----------
Releases 130 and 135, as amended, of the Commission.

      The undersigned has been further advised that pursuant to the terms of the
Agreement  and  Plan  of  Merger,  dated  as  of  June  14,  1999  (the  "Merger
                                                                          ------
Agreement"),  by  and  between  the  Company,  Unisys  Corporation,  a  Delaware
- ---------
corporation ("Parent"),  and Shellco Inc., a California corporation and a wholly
              ------
owned  subsidiary  of Parent  ("Shellco"),  Shellco will merge with and into the
                                -------
Company,  and as a result of such merger (the "Parent Merger"),  the undersigned
                                               -------------
will receive shares of Parent Common Stock (as defined in the Merger  Agreement)
in exchange for shares of Company Common Stock and Preferred  Stock owned by the
undersigned.

      1.  The   undersigned   represents,   warrants  and  covenants   that  the
undersigned:


                                      - 1 -



            A.  Has  read  carefully   this  letter  and  discussed   applicable
      limitations  upon the  ability of the  undersigned  to sell,  transfer  or
      otherwise  dispose of Parent  Common  Stock to the extent the  undersigned
      believes  necessary  with  counsel of the  undersigned  or counsel for the
      Company.

            B.  Has been advised that the issuance of Parent Common Stock to the
      undersigned  pursuant to the Merger will be registered with the Commission
      under  the Act on a  Registration  Statement  on Form  S-4.  However,  the
      undersigned  has also  been  advised  that,  since at the time the  Merger
      Agreement, and the Merger will be submitted for a vote of the stockholders
      of the Company, the undersigned may be deemed to have been an affiliate of
      the Company and the distribution by the undersigned of Parent Common Stock
      has not been registered  under the Securities Act of 1933, as amended (the
      "Securities  Act"),  the undersigned  may not sell,  transfer or otherwise
      dispose of Parent  Common Stock issued to the  undersigned  in the Merger,
      unless (i) such sale,  transfer or other  disposition  has been registered
      under the Securities Act, (ii) such sale, transfer or other disposition is
      made in  conformity  with the  volume  and other  limitations  of Rule 145
      promulgated  by the  Commission  under the  Securities  Act,  or (iii) the
      undersigned  delivers  an  opinion  of counsel  reasonably  acceptable  to
      Parent,  or a  "no-action"  or  interpretive  letter of the  Commission is
      furnished  to  Parent,   stating  that,  such  sale,   transfer  or  other
      disposition  is otherwise  exempt from  registration  under the Securities
      Act.

            C.  Understands  that Parent is under no  obligation to register the
      sale,  transfer  or  other  disposition  of  Parent  Common  Stock  by the
      undersigned or on behalf of the undersigned under the Securities Act or to
      take any  other  action  necessary  in order  to make  compliance  with an
      exemption from such registration available.

            D.  Also understands that Parent may give stop transfer instructions
      to its transfer  agent with respect to Parent  Common Stock to enforce the
      restrictions  on the undersigned set forth herein and that it reserves the
      right to place on the  certificates  for Parent Common Stock issued to the
      undersigned, or any substitutions therefor, a legend stating in substance:

            "The securities  represented by this certificate have been issued in
      a transaction  to which Rule 145  promulgated  under the Securities Act of
      1933 applies and may only be sold or otherwise  transferred  in compliance
      with the requirements of Rule 145 or pursuant to a registration  statement
      under said Act or an exemption from such registration."


                                      - 2 -



            E.  Also understands  that unless the transfer by the undersigned of
      Parent Common Stock of the undersigned  has been registered  under the Act
      or is a sale made in conformity  with the  provisions of Rule 145,  Parent
      reserves the right to put the following legend on the certificates  issued
      to transferees of the undersigned:

            "The  securities  represented  by this  certificate  have  not  been
      registered  under  the  Securities  Act of 1933 and were  acquired  from a
      person  who  received  such  shares  in a  transaction  to which  Rule 145
      promulgated under the Securities Act of 1933 applies.  The securities have
      been  acquired  by the  holder  not  with  a view  to,  or for  resale  in
      connection  with,  any  distribution  thereof  within  the  meaning of the
      Securities  Act  of  1933  and  may  not be  sold,  pledged  or  otherwise
      transferred  except in accordance with an exemption from the  registration
      requirements of the Securities Act of 1933."

            F.  Further  represents, warrants and covenants  that, from the date
      that is 30 days  prior to the  Effective  Time (as  defined  in the Merger
      Agreement) the undersigned  will not sell,  transfer or otherwise  dispose
      of, or, as  contemplated  by  Accounting  Series  Releases 130 and 135, as
      amended,  of the  Commission,  reduce his, her or its risk relative to any
      shares of Company Common Stock held by the undersigned and the undersigned
      will not sell,  transfer or otherwise  dispose of, or as  contemplated  by
      Accounting Series Releases 130 and 135, as amended, reduce his, her or its
      risk  relative  to any  shares of Parent  Company  Stock  received  by the
      undersigned  in the Merger or other  shares of Parent  Common  Stock until
      after  such  time as  results  covering  at  least  30  days  of  combined
      operations of Parent and the Company have been published by Parent, in the
      form of a quarterly earnings report, an effective  registration  statement
      filed with the Commission,  a report to the Commission on Form 10-K, 10-Q,
      or 8-K, or any other  public  filing or  announcement  which  includes the
      results of at least 30 days of combined operations.

            G. Neither the execution of this letter nor any provisions set forth
      herein shall be  construed as an admission on the part of the  undersigned
      that the  undersigned  is an  affiliate of the Company as described in the
      first  paragraph  of  this  letter,  or as a  waiver  of  any  rights  the
      undersigned  may have to object to any claim that the  undersigned is such
      an affiliate on or after the date of this letter.

      2. By Parent's and the Company's  acceptance  of this letter,  each of the
Company and Parent hereby  severally  agrees with the  undersigned to the extent
applicable as follows:

            A.  For so  long  as  and to the  extent  necessary  to  permit  the
undersigned


                                      - 3 -



      to sell  Parent  Common  Stock  pursuant  to Rule 145 and,  to the  extent
      applicable,  Rule 144 under the Act,  Parent shall (a) use its  reasonable
      efforts to (i) file, on a timely  basis,  all reports and data required to
      be  filed  with  the  Commission  by it  pursuant  to  Section  13 of  the
      Securities Exchange Act of 1934, as amended (the "Exchange Act"), and (ii)
                                                        ------------
      furnish to the undersigned upon request a written  statement as to whether
      Parent has complied with such reporting  requirements during the 12 months
      preceding  any proposed  sale of Parent  Common  Stock by the  undersigned
      under Rule 145, and (b)  otherwise  use its  reasonable  efforts to permit
      such sales pursuant to Rule 145 and Rule 144.  Parent and the Company have
      filed all reports  required to be filed with the Commission  under Section
      13 of the Exchange Act during the preceding 12 months.

            B. It is understood and agreed that certificates with the legend set
      forth in  paragraphs  D and E above will be  substituted  by  delivery  of
      certificates  without  such legend if (i) one year shall have elapsed from
      the date the  undersigned  acquired  Parent Common Stock,  received in the
      Merger and the  provisions  of Rule  145(d)(2)  are then  available to the
      undersigned,  (ii)  two  years  shall  have  elapsed  from  the  date  the
      undersigned  acquired  Parent Common Stock  received in the Merger and the
      provisions of Rule 145(d)(3) are then  applicable to the  undersigned,  or
      (iii) Parent has received either an opinion of counsel,  which opinion and
      counsel  shall be  reasonably  satisfactory  to it,  or a  "no-action"  or
      interpretive  letter  obtained  by the  undersigned  from the staff of the
      Commission,  to the effect that the  restrictions  imposed by Rule 144 and
      Rule 145 under the Securities Act no longer apply to the undersigned.


                                          Very truly yours,

                                          __________________________
                                          Signature


                                          __________________________
                                          Print Name


                                      - 4 -



ACCEPTED:

Dated:

UNISYS CORPORATION

By:_____________________________
Name:___________________________
Title:__________________________

Dated:

PULSEPOINT COMMUNICATIONS

By:_____________________________
Name:___________________________
Title:__________________________

Dated:



                                      - 5 -