UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                          Washington, D. C. 20549
                                SCHEDULE 13D
                 Under the Securities Exchange Act of 1934
                             (Amendment No. )*
                                 ----------

                         Pulsepoint Communications
-------------------------------------------------------------------------------
                              (Name of Issuer)

                         COMMON STOCK, no par value
-------------------------------------------------------------------------------
                       (Title of Class of Securities)

                                 745913103
               ----------------------------------------------
                               (CUSIP Number)

                              Harold S. Barron
                             Unisys Corporation
                                 Unisys Way
                       Blue Bell, Pennsylvania 19424
                         Telephone: (215) 986-5299
-------------------------------------------------------------------------------
    (Name, Address and Telephone Number of Person Authorized to Receive
                        Notices and Communications)

                               June 14, 1999
               ----------------------------------------------
          (Date of Event which  Requires  Filing of this  Statement)

If the filing  person has  previously  filed a statement on Schedule 13G to
report the  acquisition  which is the subject of this  Schedule 13D, and is
filing  this  schedule  because  of  Rule  13d-1(b)(3)  or (4),  check  the
following box .

Note: Six copies of this statement, including all exhibits, should be filed
with the Commission. See Rule 13d-1(a) for other parties to whom copies are
to be sent.

*The  remainder  of this cover  page  shall be filled  out for a  reporting
person's  initial  filing on this form with respect to the subject class of
securities,  and for any subsequent amendment containing  information which
would alter disclosures provided in a prior cover page.

The  information  required on the remainder of this cover page shall not be
deemed to be  "filed"  for the  purpose  of  Section  18 of the  Securities
Exchange  Act of 1934 ("Act") or otherwise  subject to the  liabilities  of
that section of the Act but shall be subject to all other provisions of the
Act (however, see the Notes).

<PAGE>
                             SCHEDULE 13D

CUSIP No. 745913103                          Page 2 of 12 Pages

1   NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

    UNISYS CORPORATION                                 38-0387840

2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a)  [ ]
                                                         (b)  [X]

3   SEC USE ONLY

4   SOURCE OF FUNDS*

    N/A

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
    PURSUANT TO ITEMS 2(d) or 2(e)                           [ ]

6   CITIZENSHIP OR PLACE OF ORGANIZATION

    DELAWARE

  NUMBER OF      7  SOLE VOTING POWER

   SHARES           1,109,937**

 BENEFICIALLY    8  SHARED VOTING POWER

OWNED BY EACH       610,833**

 REPORTING       9  SOLE DISPOSITIVE POWER

PERSON WITH         1,109,937**

                10  SHARED DISPOSITIVE POWER

                    0****

11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,720,770***

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)             [ ]
    EXCLUDES CERTAIN SHARES*

13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    25.73%

14  TYPE OF REPORTING PERSON*

    CO


                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
   (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

<PAGE>
                            SCHEDULE 13D

CUSIP No. 745913103                          Page 3 of 12 Pages

----------------------
**        Unisys Corporation is a party to an Agreement and Plan of Merger
          dated as of June 14, 1999 by and among Unisys Corporation,
          PulsePoint Communications ("PulsePoint") and Shellco Inc., a wholly
          owned subsidiary of Unisys Corporation, providing for the merger of
          Shellco Inc. into PulsePoint (the "Merger"), described further in
          Item 4 of this Statement.  1,109,937 shares of common stock, no par
          value ("PulsePoint Common Stock"), of PulsePoint Communications
          ("PulsePoint") are purchasable by Unisys Corporation ("Unisys")
          upon exercise of an option granted to Unisys on June 14, 1999 and
          described in Item 4 of this Statement.  Prior to the exercise of
          the option, Unisys is not entitled to any rights as a stockholder
          of PulsePoint with respect to the shares of PulsePoint Common Stock
          covered by the option.  Unisys disclaims any beneficial ownership
          of the shares of PulsePoint Common Stock which are purchasable by
          Unisys upon exercise of the option on the grounds that the option
          is not presently exercisable and only becomes exercisable upon the
          occurrence of the events referred to in Item 4 of this Statement.
          If the option were exercised, Unisys would have the sole right to
          vote and to dispose of the shares of PulsePoint Common Stock issued
          as a result of such exercise.

 ***      Unisys has the right to vote 610,833 shares of PulsePoint Common
          Stock, representing 10.95 percent of the shares outstanding (as of
          May 25, 1999) in favor of the Merger pursuant to the Voting
          Agreements described below.  Shares obtainable upon exercise of the
          option described above are not eligible to vote on the Merger, but
          would represent 16.6% of the outstanding shares if the Option were
          to be exercised.  The amount listed as beneficially owned is the
          sum of (i) the 1,109,937 shares obtainable upon exercise of the
          option and (ii) the 610,833 shares which may be voted by Unisys in
          favor of the Merger. Under certain circumstances described below,
          Unisys will have the right to vote 38 percent of the shares of
          PulsePoint common stock in favor of the Merger.

          Certain  institutional holders (listed below) owning more than 90
          percent  of the  outstanding  shares  of  PulsePoint  convertible
          preferred  stock and 10.95 percent of the  outstanding  shares of
          PulsePoint  Common  Stock  have  agreed  to vote in  favor of the
          Merger,  pursuant to the terms of Voting  Agreements (the "Voting
          Agreements")  dated  as of June  14,  1999  between  each of such
          holders  and  Unisys.   Each  of  such  holders  has  granted  an
          irrevocable proxy in favor of Unisys to vote their shares of such
          preferred  stock and common stock in favor of the Merger.  Unisys
          has the right under the Voting  Agreements to vote 633,838 shares
          of  PulsePoint  Common  Stock owned by Bandel  Carano and the Oak
          Entities  (defined  below) in favor of the  Merger  (representing
          10.95% of the shares outstanding as of May 25, 1999). In addition
          these  holders  have also agreed  pursuant to the terms of letter
          agreements  (the "Letter  Agreements")  dated as of June 14, 1999
          between each of such holders and Unisys, subject to completion of
          the  registration  process in connection  with the Merger by July
          30, 1999, to convert a portion of their  preferred  holdings into
          PulsePoint   Common   Stock  prior  to  the  special   PulsePoint
          shareholder meeting and to also vote those common shares in favor
          of the merger. In such event, 89 percent of the PulsePoint series
          B convertible  preferred  shares and 38 percent of the PulsePoint
          Common  Stock will be  committed  to approve the  merger.  If the
          registration  process is not completed by July 30, 1999,  and the
          holders of the preferred  stock elect not to convert,  Unisys has
          the right to terminate  the  transaction  before August 20, 1999.

          Each of the  following  persons is a party to a Voting  Agreement
          and a  Letter  Agreement:  Oak  Investment  Partners  V,  Limited
          Partnership;  Oak Investment  Partners VII, Limited  Partnership;
          Oak  Investment  Partners  III,  a Limited  Partnership;  Oak VII
          Affiliates  Fund,  Limited  Partnership;  Oak V Affiliates  Fund,
          Limited Partnership; Bandel L. Carano, an individual; Fredrick J.
          Warren,  an  individual;  and Robin Grace Warren,  an individual;
          Moore Global Investments,  Ltd.; Remington Investment Strategies,
          L.P.;  Citiventure 96 Partnership Fund, L.P.;  Chancellor Private
          Capital Offshore  Partners II, L.P.;  Chancellor  Private Capital
          Partners III, L.P.;  Chancellor Private Capital Offshore Partners
          I, C.V.; and Microsoft Corporation.

 ****     Pursuant  to  the  terms  of the  Voting  Agreements  and  Letter
          Agreements  described  above  and in  Item 4 to  this  Statement,
          holders of shares of PulsePoint  Common Stock and preferred stock
          subject to such  agreements may only transfer such shares subject
          to the terms of such agreement.

<PAGE>
                                 SCHEDULE 13D
                       RELATING TO THE COMMON STOCK OF
                          PULSEPOINT COMMUNICATIONS

Item 1.  Security and Issuer
         -------------------

            This Statement on Schedule 13D (this "Statement") relates to the
common stock, no par value ("PulsePoint Common Stock"), of PulsePoint
Communications, a California corporation ("PulsePoint").  The principal
executive offices of PulsePoint are located at 6307 Carpinteria Avenue,
Carpinteria, California 93013.

Item 2.  Identity and Background
         -----------------------

            This Statement is being filed by Unisys Corporation, a Delaware
corporation ("Unisys").  The principal business address of Unisys is Unisys
Way,  Blue Bell,  Pennsylvania  19424.  Unisys is a  worldwide  information
services and technology company that provides systems and solutions to help
customers apply information technology to solve their business problems.

            (a)-(c);  (f) The name,  business  address,  present  principal
occupation  or  employment,  and the name  and  principal  business  of any
corporation or other  organization in which such employment is conducted of
each of the  directors  and  executive  officers  of Unisys is set forth in
Schedule I hereto,  which is incorporated herein by reference.  Each person
listed in Schedule I hereto is a citizen of the United States.

            (d)-(e) During the last five years,  neither Unisys nor, to the
knowledge of Unisys, any of the persons listed on Schedule I hereto (i) has
been convicted in a criminal  proceeding  (excluding  traffic violations or
similar  misdemeanors)  or (ii) has been a party to a civil proceeding of a
judicial or administrative  body of competent  jurisdiction and as a result
of such  proceeding was or is subject to a judgment,  decree or final order
enjoining  future  violations of, or  prohibiting  or mandating  activities
subject to, federal or state  securities laws or finding any violation with
respect  to such  laws.

Item 3.  Source  and  Amount  of  Funds  or  Other
         Consideration
         -----------------------------------------

            As more fully  described  below,  pursuant  to the terms of the
Stock Option  Agreement (as defined in the response to Item 4), Unisys will
have the right, upon the occurrence of certain events specified therein, to
purchase  from time to time up to  1,109,937  shares of  PulsePoint  Common
Stock (subject to adjustment as provided in the Stock Option  Agreement) at
a price of $6.60 per share.  If Unisys  purchases  PulsePoint  Common Stock
pursuant to the Stock Option Agreement,  Unisys  anticipates that the funds
to finance  such  purchase  would come from  working  capital,  although no
definitive  determination  has been made at this  time as to the  source of
such funds.  However,  pursuant to the terms of the Stock Option Agreement,
Unisys can  perform a cashless  exercise  of the Option (as  defined in the
response to Item 4), requiring no funds to gain the benefits of the Option.


Item 4. Purpose of the Transaction
        --------------------------

            (a)-(j) On June 14, 1999, Unisys, PulsePoint, and Shellco Inc.,
a California  corporation and a wholly owned  subsidiary of Unisys ("Merger
Sub"),  entered into an Agreement and Plan of Merger,  dated as of June 14,
1999 (the "Merger Agreement"), a copy of which is incorporated by reference
as Exhibit 1 and is incorporated herein by reference.  The Merger Agreement
provides,  among other  things,  for the merger of Merger Sub with and into
PulsePoint (the "Merger") with PulsePoint  being the corporation  surviving
the Merger (the "Surviving Corporation").

            Pursuant to the Merger  Agreement,  at the  Effective  Time (as
defined in the Merger Agreement),  Merger Sub shall be merged with and into
PulsePoint and the separate corporate  existence of Merger Sub shall cease.
PulsePoint will continue as the surviving corporation in the Merger. At the
Effective Time, PulsePoint will become a wholly owned subsidiary of Unisys.
As a  consequence  of the Merger,  Unisys  will own 100% of the  PulsePoint
Common Stock.

            In the merger,  each share of  PulsePoint  Common Stock will be
converted  into Unisys  common  stock using an exchange  ratio based on the
average  price of Unisys common stock during a 20  consecutive  trading-day
period ending on the fourth trading day prior to the PulsePoint shareholder
meeting to approve the  transaction.  The ratio will  provide for a maximum
consideration  of $6.60 (if the  average  price of Unisys  common  stock is
above $33.00) and a minimum consideration of $5.40 (if the average price is
below $27.00) for each PulsePoint common share. If the Unisys average price
is between  $27.00 and 33.00,  PulsePoint  shareholders  will  receive  0.2
shares of Unisys  common stock for each share of  PulsePoint  Common Stock.
PulsePoint  convertible  preferred  stock will be converted into PulsePoint
Common Stock prior to the Merger.

            Consummation  of the Merger is subject to the  satisfaction  or
waiver at or prior to the Effective Time of certain conditions,  including,
but not limited to, approval of the Merger and the Merger  Agreement by the
holders  of shares of  PulsePoint  Common  Stock and  PulsePoint  preferred
stock,  expiration or termination of the applicable  waiting  periods under
the Hart-Scott-Rodino  Anti-Trust Improvements Act of 1976, as amended, and
various other customary conditions.

            The Merger Agreement contains certain customary restrictions on
the conduct of the business of  PulsePoint  pending the Merger,  including,
without limitation, not declaring,  setting aside or paying any dividend or
distribution  payable in cash,  stock or property in respect of any capital
stock of PulsePoint.

            Concurrent with the execution of the Merger  Agreement,  Unisys
and PulsePoint entered into a Stock Option Agreement,  dated as of June 14,
1999 (the "Stock Option  Agreement"),  a copy of which is  incorporated by
reference as Exhibit 2 and is incorporated herein by reference. Pursuant to
the Stock Option  Agreement,  PulsePoint  granted Unisys an  unconditional,
irrevocable  option (the  "Option") to purchase,  pursuant to the terms and
conditions  thereof,  up to 1,109,937 (subject to adjustment as provided in
the  Stock  Option  Agreement)  fully  paid  and  nonassessable  shares  of
PulsePoint  Common  Stock at a price of $6.60 per share (such  shares,  the
"Option  Shares" and such  price,  the "Option  Price").  The Stock  Option
Agreement provides that Unisys may exercise the Option in whole or in part,
at any time or from time to time after but only after the occurrence of any
event as a result of which  Unisys is entitled  to receive the  Termination
Fee  pursuant  to  Section  8.2 of the  Merger  Agreement  and  the  Merger
Agreement is being or has been terminated (an "Exercise Event");  provided,
however,  that except as provided in the last  sentence of this  paragraph,
the Option shall  terminate  and be of no further force and effect upon the
earliest to occur of (A) the  Effective  Time and (B) nine months after the
first occurrence of an Exercise Event.  Notwithstanding  the termination of
the Option,  Unisys shall be entitled to purchase  the Option  Shares if it
has exercised  the Option in accordance  with the terms hereof prior to the
termination  of the Option  and the  termination  of the  Option  shall not
affect any  rights  thereunder  which by their  terms do not  terminate  or
expire prior to or as of such termination.

            Certain  institutional  holders (listed below) owning more than
90 percent of the outstanding  shares of PulsePoint  convertible  preferred
stock and approximately 10 percent of the outstanding  shares of PulsePoint
Common  Stock have agreed to vote in favor of the  Merger,  pursuant to the
terms of Voting Agreements (the "Voting  Agreements")  dated as of June 14,
1999 between  each such holder and Unisys.  Each such holder has granted an
irrevocable proxy in favor of Unisys to vote their shares of such preferred
stock and common  stock in favor of the Merger.  Unisys has the right under
the Voting  Agreements to vote 610,833  shares of  PulsePoint  Common Stock
owned  by  the  Oak  Entities  (defined  below)  in  favor  of  the  merger
(representing  10.95% of the shares  outstanding  as of May 25,  1999).  In
addition  these  holders  have also agreed  pursuant to the terms of letter
agreements (the "Letter Agreements") dated as of June 14, 1999 between each
of such  holders  and Unisys,  subject to  completion  of the  registration
process  in  connection  with the  merger by July 30,  1999,  to  convert a
portion of their preferred  holdings into common stock prior to the special
PulsePoint  shareholder  meeting  and to also vote those  common  shares in
favor of the merger. In such event, 89 percent of the PulsePoint  preferred
shares and 38 percent of the PulsePoint  common shares will be committed to
approve the merger.  If the  registration  process is not completed by July
30,  1999,  and the  holders of the  preferred  stock elect not to convert,
Unisys has the right to terminate the transaction before August 20, 1999.

            Each of the following  persons is a party to a Voting Agreement
and a Letter Agreement: Oak Investment Partners V, Limited Partnership, Oak
Investment Partners VII, Limited Partnership,  Oak Investment Partners III,
A Limited Partnership,  Oak VII Affiliates Fund, Limited Partnership, Oak V
Affiliates  Fund,  Limited  Partnership,  Bandel L. Carano,  an individual,
Fredrick J. Warren,  an individual,  and Robin Grace Warren, an individual,
Moore Global Investments,  Ltd.,  Remington  Investment  Strategies,  L.P.,
Citiventure 96 Partnership Fund, L.P.,  Chancellor Private Capital Offshore
Partners  II,  L.P.,   Chancellor   Private  Capital  Partners  III,  L.P.,
Chancellor  Private  Capital  Offshore  Partners  I,  C.V.,  and  Microsoft
Corporation.

            The  foregoing  summaries  of the Merger  Agreement,  the Stock
Option  Agreement,  the Voting  Agreements and the Letter Agreements do not
purport to be complete and are qualified in their  entirety by reference to
the  text  of  such  agreements   included  as  Exhibits  1,  2,  3  and  4
respectively.

            Except as set forth in this  Statement,  the Merger  Agreement,
the Stock Option Agreement, the Voting Agreements and the Letter Agreements
neither  Unisys  nor,  to  the  best  of  Unisys's  knowledge,  any  of the
individuals  named in  Schedule I hereto has any plans or  proposals  which
relate  to or  which  would  result  in or  relate  to any  of the  actions
specified in subparagraphs (a) through (j) of Item 4 of Schedule 13D.


Item 5.  Interest in Securities of the Issuer
         ------------------------------------

            (a) - (b) By  reason  of its  execution  of  the  Stock  Option
Agreement,  Unisys may be deemed to have beneficial  ownership of, and sole
voting and  dispositive  power with  respect  to, the shares of  PulsePoint
Common  Stock  subject to the Option and,  accordingly,  might be deemed to
beneficially own 1,109,937 shares of PulsePoint Common Stock.  Based on the
number of shares of PulsePoint  Common Stock subject to the Option,  Unisys
may be deemed to beneficially  own  approximately  16.6% of the outstanding
PulsePoint  Common Stock (based upon (i) the 5,577,572 shares of PulsePoint
Common Stock  outstanding  on May 25,  1999,  as  represented  to Unisys by
PulsePoint in the Merger Agreement, and (ii) an additional 1,109,937 shares
that  PulsePoint  will  issue to  Unisys in the  event  that the  Option is
exercised)  following  the  exercise  in whole of the Option for  1,109,937
shares of PulsePoint Common Stock. However,  Unisys expressly disclaims any
beneficial  ownership  of the shares of  PulsePoint  Common Stock which are
purchasable by Unisys upon exercise of the Option,  on the grounds that the
Option is not presently  exercisable and only becomes  exercisable upon the
occurrence  of the events  referred to in Item 4 above.  If the Option were
exercised,  Unisys  would have the sole right to vote and to dispose of the
shares of PulsePoint issued as a result of such exercise.

            In addition, pursuant to the terms of the Voting Agreements and
the Letter  Agreements,  Unisys may be deemed to be the beneficial owner of
shares of PulsePoint Common Stock subject to such agreements.

            Unisys  has the  right to vote  610,833  shares  of  PulsePoint
Common Stock,  representing  10.95 percent of the shares outstanding (as of
May 25,  1999) in favor of the Merger  pursuant  to the  Voting  Agreements
described  below.  Shares  obtainable upon exercise of the option described
above are not eligible to vote on the Merger,  but would represent 16.6% of
the  outstanding  shares if the  Option  were to be  exercised.  The amount
listed on item 11 of Schedule 13D as  beneficially  owned is the sum of (i)
the 1,109,937  shares  obtainable  upon exercise of the option and (ii) the
610,833  shares which may be voted by Unisys in favor of the Merger.  Under
certain circumstances, Unisys will have the right to vote 38 percent of the
shares of PulsePoint Common Stock in favor of the Merger.

            Certain  institutional  holders (listed below) owning more than
90 percent of the outstanding  shares of PulsePoint  convertible  preferred
stock and 10.95  percent of the  outstanding  shares of  PulsePoint  Common
Stock have agreed to vote in favor of the Merger,  pursuant to the terms of
Voting  Agreements  (the  "Voting  Agreements")  dated as of June 14,  1999
between each of such  holders and Unisys.  Each of such holders has granted
an  irrevocable  proxy in favor of  Unisys  to vote  their  shares  of such
preferred  stock and common  stock in favor of the  Merger.  Unisys has the
right under the Voting  Agreements  to vote  610,833  shares of  PulsePoint
Common  Stock  owned by the Oak  Entities  (defined  below) in favor of the
Merger  (representing 10.95% of the shares outstanding as of May 25, 1999).
In addition these holders have also agreed  pursuant to the terms of letter
agreements (the "Letter Agreements") dated as of June 14, 1999 between each
of such  holders  and Unisys,  subject to  completion  of the  registration
process  in  connection  with the  Merger by July 30,  1999,  to  convert a
portion of their preferred  holdings into common stock prior to the special
PulsePoint shareholder meeting and to also vote those common stock in favor
of the Merger. In such event, 89 percent of the PulsePoint preferred shares
and 38 percent of the PulsePoint  Common Stock will be committed to approve
the Merger. If the registration  process is not completed by July 30, 1999,
and the holders of the preferred stock elect not to convert, Unisys has the
right to terminate the transaction before August 20, 1999.

            (c) Neither Unisys nor, to the best of Unisys's knowledge,  any
of the individuals named in Schedule I hereto, has effected any transaction
in PulsePoint Stock during the past 60 days.

            (d) So long as Unisys has not  exercised  the Option (and prior
to the  consummation  of the  Merger),  Unisys  does not have the  right to
receive  or the power to direct  the  receipt  of  dividends  from,  or the
proceeds  from  the sale of,  any  shares  of  PulsePoint  Common  Stock or
preferred stock.

            (e)  Not applicable.

Item 6.  Contracts, Arrangements, Understandings or Relationships with 
         Respect to Securities of the Issuer
         --------------------------------------------------------------

         Except as provided in the Merger Agreement, the Voting Agreements
and the Letter Agreements or as set forth in this Statement, neither Unisys
nor, to the best of Unisys's  knowledge,  any of the  individuals  named in
Schedule  I  hereto  has any  contracts,  arrangements,  understandings  or
relationships  (legal or  otherwise)  with any person  with  respect to any
securities of PulsePoint, including, but not limited to, transfer or voting
of any of the securities,  finder's fees,  joint  ventures,  loan or option
arrangements,  puts or calls, guarantees of profits, division of profits or
loss, or the giving or withholding of proxies.


Item 7. Material to be Filed as Exhibits
        --------------------------------

         Exhibit 1     Agreement and Plan of Merger,  dated as of June
                       14, 1999, among Unisys, Shellco Inc. and PulsePoint.
                       Incorporated   by   reference   to  Exhibit  2.1  of
                       PulsePoint  Communications  current  report  on Form
                       8-K, dated June 14, 1999.

         Exhibit 2     Stock  Option  Agreement,  dated as of June 14,
                       1999,  between Unisys and PulsePoint  (PulsePoint as
                       Issuer).  Incorporated  by reference to Exhibit 10.1
                       of  PulsePoint's  current  report on Form 8-K, dated
                       June 14, 1999.

         Exhibit 3*    Form of Voting Agreement, dated as of June 14,
                       1999.  Incorporated  by reference to Exhibit 10.2 of
                       PulsePoint  Communications'  current  report on Form
                       8-K, dated June 14, 1999.

         Exhibit 4**   Form  of  Letter  Agreement.   Incorporated  by
                       reference    to   Exhibit    10.3   of    PulsePoint
                       Communications'  current  report  on form 8-K  dated
                       June 14, 1999.

 * Unisys  Corporation has entered into a Voting Agreement in substantially
 the form incorporated by reference  herewith with Oak Investment  Partners
 V, Limited Partnership;  Oak Investment Partners VII, Limited Partnership;
 Oak  Investment  Partners III, A Limited  Partnership;  Oak VII Affiliates
 Fund, Limited Partnership; Oak V Affiliates Fund, Limited Partnership; and
 Bandel L. Carano (collectively,  the "Oak Entities"); Frederick J. Warren;
 Microsoft  Corporation;   Citiventure  96  A.P.  Partnership  Fund,  L.P.;
 Chancellor Private Capital Offshore Partners II, L.P.;  Chancellor Private
 Capital  Partners III,  Limited  Partnership;  Chancellor  Private Capital
 Offshore  Partners I, C.V.; Moore Global  Investments,  Ltd. and Remington
 Investment Strategies, L.P.

** Unisys and PulsePoint have received  letters in  substantially  the form
incorporated  by  reference  herein  from the Oak  Entities;  Frederick  J.
Warren; Microsoft Corporation;  Citiventure 96 A.P. Partnership Fund, L.P.;
Chancellor  Private Capital Offshore Partners II, L.P.;  Chancellor Private
Capital  Partners III,  Limited  Partnership;  Chancellor  Private  Capital
Offshore  Partners I, C.V.;  Moore Global  Investments,  Ltd. and Remington
Investment  Strategies,  L.P.; except that the letter from the Oak Entities
provides for the  conversion of thirty three percent (33%) of shares of the
PulsePoint preferred stock held by them.

<PAGE>
                                  SIGNATURE
             After  reasonable  inquiry and to the best of my knowledge and
 belief,  I certify  that the  information  set forth in this  Statement is
 true, complete and correct.

 Dated: June 24, 1999
                                          UNISYS CORPORATION


                                          By: /s/ Robert H. Brust
                                          ------------------------
                                          Name:  Robert H. Brust
                                          Title: Senior Vice President and
                                                 Chief Financial Officer

<PAGE>
                                  SCHEDULE I
                     DIRECTORS AND EXECUTIVE OFFICERS OF
                              UNISYS CORPORATION

            The name, present principal  occupation or employment,  and the
name of any  corporation or other  organization in which such employment is
conducted,  of each of the  directors  and  executive  officers  of  Unisys
Corporation  ("Unisys")  is set  forth  below.  Each of the  directors  and
executive  officers  is a citizen of the United  States.  Unless  otherwise
indicated below,  the business address of each executive  officer is Unisys
Corporation, Unisys Way, Blue Bell, Pennsylvania 19424.

Name                            Present Principal Occupation or Employment
----                            ------------------------------------------

           Directors
           ---------

J.P. Bolduc                     Chairman and Chief Executive Officer of JPB
                                Enterprises, Inc.

James J. Duderstadt             President Emeritus and University Professor
                                of Science and Engineering at the
                                University of Michigan

Kenneth A. Macke                General Partner of Macke Partners

Gail D. Fosler                  Senior Vice President and Chief Economist
                                of The Conference Board

Melvin R. Goodes                Retired Chairman and Chief Executive
                                Officer of Warner-Lambert Company

Edwin A. Huston                 Vice Chairman of Ryder System, Inc.

Robert McClements, Jr.          Retired Chairman, President and Chief
                                Executive Officer of Sun Company, Inc.

Henry C. Duques                 Director and Chairman and Chief Executive
                                Officer of First Data Corporation

Theodore E. Martin              Retired President and Chief Executive
                                Officer of Barnes Group Inc.

Lawrence A. Weinbach            Chairman of the Board, President and Chief
                                Executive Officer of Unisys

           Executive Officers
           ------------------

Lawrence A. Weinbach            Chairman of the Board, President and Chief
                                Executive Officer

Gerald A. Gagliardi             Executive Vice President; President, Unisys
                                Global Customer Services

George R. Gazerwitz             Executive Vice President; President, Unisys
                                Computer Systems

Lawrence C. Russell             Executive Vice President; President, Unisys
                                Information Services

David O. Aker                   Senior Vice President, Worldwide Human
                                Resources

Harold S. Barron                Senior Vice President, General Counsel and
                                Secretary

Jack A. Blaine                  Senior Vice President; President, Pacific
                                Asia Americas

Robert H. Brust                 Senior Vice President and Chief Financial
                                Officer

Joseph W. McGrath               Senior Vice President; Major Accounts Sales
                                and Chief Marketing Officer

James F. McGuirk II             Senior Vice President, President, Unisys
                                Federal Systems

Richard D. Badler               Vice President, Corporate Communications

Janet Brutschea Haugen          Vice President and Controller

Jack F. McHale                  Vice President, Investor Relations

Angus F. Smith                  Vice President and Treasurer