Unisys Corporation
            PO Box 500
            Blue Bell PA 19424 0001

                                                     NEWS RELEASE
                                                     ------------


Contacts    Brian Daly, Unisys  (215) 986-2214
                        Internet: brian.daly@unisys.com


            Pam Thompson, PulsePoint Communications (805) 566-2000
                        Internet: pam.thompson@plpt.com

UNISYS TO ACQUIRE PULSEPOINT COMMUNICATIONS

Will target  new-breed  communications  services  providers  with solutions that
- --------------------------------------------------------------------------------
leverage network convergence
- ----------------------------

BLUE BELL, PA, AND CARPINTERIA,  CA, JUNE 15, 1999 -- Unisys  Corporation (NYSE:
UIS) and PulsePoint Communications (NASDAQ: PLPT) today announced that they have
signed an agreement  for Unisys to acquire  PulsePoint,  a leading  developer of
carrier-class enhanced services solutions for the communications  industry, in a
tax-free,  stock-for-stock  merger.  The purchase price will be dependent on the
value of the Unisys common stock to be issued in the transaction at the closing.
Based on yesterday's closing price of Unisys stock, the value of the transaction
would be  approximately  $100  million on a fully  diluted  basis,  or $6.60 per
PulsePoint common share.

PulsePoint  has  developed  the  industry's  first  "next-generation"  messaging
platform based on Microsoft Windows NT Server and an open-standards architecture
to provide carrier-class that is,  ultra-high-reliability - performance.  Unisys
will use the PulsePoint solutions as multimedia messaging solutions designed for
new-breed  communications services providers,  who are emerging as the result of
telecommunications   industry   deregulation   worldwide  and   leveraging   the
convergence of voice and data networking.





Page 2

These  solutions will give customers easy access to all their messages -- voice,
FAX and e-mail -- from a single mailbox using a variety of devices: conventional
telephones,  cellular  and smart  phones and  personal  computers.  For example,
consumers  or business  users will be able to retrieve a voice  message  through
their  PC's  e-mail  client  or have an  e-mail  message  read to them  over the
telephone. Page 2

The  acquisition  will  significantly  expand  Unisys  portfolio  of  repeatable
messaging  solutions from those applicable in large telephony companies to those
used by small/mid-size and "next-generation" services providers, who represent a
substantial portion of the worldwide market,  while accelerating the addition of
new features to Unisys current messaging solutions.  Unisys repeatable solutions
for   communications  and  other  key  market  sectors  combine  consulting  and
integration services with software components that can be assembled and modified
quickly  and   cost-effectively   to  meet  the  customer's   specific  business
requirements.

"Best-in-class  repeatable  solutions  for Unisys  strategic  markets  are a key
driver in the  growth  of our  information  services  business  and our  overall
success,"  said  Lawrence  A.  Weinbach,  Unisys  chairman  and chief  executive
officer.   "By  pairing  the   leading-edge   PulsePoint   technology  with  our
comprehensive suite of information  services,  Unisys will be poised to take our
repeatable  messaging  solutions in a new and exciting  direction to address the
needs of new-breed services providers who are revolutionizing the communications
marketplace."

These providers specialize in "next-generation"  solutions that exploit emerging
network  technologies  - such as  Internet  Protocol  (IP)  telephony - that are
different from the conventional telephony networks used by traditional carriers.
The  PulsePoint   solutions  will  provide  a  platform  for  rapid  application
development   and   customization,   enabling  Unisys  to  respond  to  clients'
requirements for applications deployable across all networks.

"The  executives  and  employees  of  PulsePoint  are excited to join the Unisys
team," said Mark C. Ozur, PulsePoint president and chief executive officer. "The
combination  of our  technologies  and  services  positions  Unisys  to lead the
industry in delivering  value added  solutions to the  new-breed  communications
services  providers  while  continuing  to  provide  leading-edge  solutions  to
telephony providers as well.  Together,  we can seize this unique opportunity to
help all customers benefit quickly and economically from the explosive growth of
IP telephony and network convergence."





Page 3

In the merger,  each PulsePoint share will be converted into Unisys common stock
using an exchange ratio based on the average price of Unisys common stock during
a 20-trading-day period preceding 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)  and  a  minimum
consideration  of $5.40 (if the average price is below $27) for each  PulsePoint
common share.  If the Unisys  average  price is between $27 and $33,  PulsePoint
shareholders  will receive 0.2 Unisys common shares for each  PulsePoint  share.
PulsePoint  convertible preferred stock will be converted into PulsePoint common
stock prior to the merger.

Based on  yesterday's  closing  price  of  $37.4375  per  Unisys  common  share,
PulsePoint  shareholders  would receive the maximum  consideration  of $6.60, or
0.176 shares of Unisys common stock for each PulsePoint common share. This would
result in a total of approximately 2.4 million Unisys shares being issued in the
merger.  In addition,  all outstanding  PulsePoint  options and warrants will be
converted into Unisys options and warrants.  On a fully diluted basis, the value
of the transaction would be approximately $100 million.

The  acquisition,  which will be  accounted  for as a pooling of  interests,  is
expected to close in the third quarter of 1999.  The  transaction  is subject to
approval by  PulsePoint  common and  preferred  shareholders,  each class voting
separately,  as well as  regulatory  approvals,  including  registration  of the
Unisys shares to be issued in the merger and  Hart-Scott-Rodino  Act review, and
customary closing conditions.

Certain  institutional  holders  owning  more than 90 percent of the  PulsePoint
convertible  preferred  shares and  approximately  10 percent of the  PulsePoint
common  shares have agreed to vote in favor of the merger.  These  holders  have
also agreed, subject to completion of the registration process by July 30, 1999,
to convert a portion of their preferred  holdings into common stock prior to the
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
elect not to convert,  Unisys has the right to terminate the transaction  before
August 20, 1999.





Page 4

The merger agreement also includes customary  non-solicitation,  termination fee
and expense reimbursement provisions. In addition, PulsePoint has granted Unisys
an option to purchase 19.9% of its outstanding common stock,  exercisable if the
merger is terminated under certain circumstances.

The executive team of PulsePoint and the approximately 150 PulsePoint  personnel
will  continue  to operate  PulsePoint  as a Unisys  company  from  PulsePoint's
Carpinteria, California facility. PulsePoint had 1998 revenue of $25.4 million.

"By  merging  with  PulsePoint,   Unisys  is  gaining  very  talented  solutions
professionals,"  said  Weinbach.  "We  are  certain  that  their  expertise  and
enthusiasm  will  help  further  the  success  of  Unisys  information  services
business."

About PulsePoint Communications
PulsePoint  Communications  develops carrier-grade solutions for progressive and
competitive   telecommunication  service  providers  worldwide.  The  PulsePoint
Enhanced  Application  Platform and PulsePoint  NextGen  Messaging  applications
bring PC  economies  to the  telecommunications  industry.  Users of  PulsePoint
Communications'   enhanced  services   applications  enjoy  anytime,   anywhere,
any-network and  any-device-access to messages and a full range of features that
put them in control of their communications. PulsePoint Communications is an ISO
9001 registered  company.  For more information,  please visit the Company's web
site at www.plpt.com.

About Unisys
Unisys is more than 33,000  employees  helping  customers in 100 countries apply
information  technology to solve their business  problems.  Unisys solutions are
based on a broad portfolio of global information  services including  electronic
business,  systems  integration  including custom and  "repeatable"  application
solutions,  outsourcing,  Microsoft Windows NT services,  network services,  and
multivendor maintenance and support,  coupled with enterprise-class  servers and
associated middleware, software and storage. Repeatable solutions are focused on
key   vertical   markets   including   financial    services,    transportation,
telecommunications, government, publishing,





Page 5

and other  commercial  markets.  The  company  is  headquartered  in Blue  Bell,
Pennsylvania,  in the Greater  Philadelphia  area.  For more  information on the
company,  access the Unisys  home page on the World Wide Web at  www.unisys.com.
Investor information can be found at  www.unisys.com/investor.

###

RELEASE NO.:  0699/XXXX

NOTE: Statements made in this document that are not historical facts,  including
those regarding future  performance,  are  forward-looking  statements under the
Private Securities  Litigation Reform Act of 1995. These statements are based on
current  expectations and assumptions and involve risks and  uncertainties  that
could  cause  actual  results  to  differ  from  expectations.  These  risks and
uncertainties  are discussed in the company's  latest  quarterly  report on Form
10-Q.

Unisys is a  registered  trademark of Unisys  Corporation.  All other brands and
products  referenced  herein are  acknowledged  to be  trademarks  or registered
trademarks of their respective holders.