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TRIMBLE, AT&T, PENSTUFF AND GO ANNOUNCE GPS INTERFACE FOR PENPOINT

 NEW YORK, June 29 /PRNewswire/ -- Trimble Navigation (NASDAQ: TRMB), PenStuff and GO have joined forces with AT&T (NYSE: T) and IBM (NYSE: IBM) to make it easier for software developers to integrate Global Positioning System (GPS) technology into their PenPoint(R) applications.
 Software developers will now be able to use the PenPoint GPS application programming interface (API) defined by the partner companies and published by GO on its Bulletin Board and CompuServe later this summer. AT&T will be demonstrating the EO 440 Personal Communicator at PC Expo industry trade show and discussing the Hobbit(R)-based implementation of the API while IBM will be showing the ThinkPad 710T running the PenPoint application which formed the basis of the API.
 GPS is a constellation of satellites, launched and maintained by the U.S. government, that orbits the earth at an altitude of 11,000 miles. Trimble designs and manufactures receivers that pick up signals from these satellites and determine positions on earth, in some cases, down to a millimeter. This is accomplished by comparing the distances to several different satellites at one time.
 Application areas for GPS in mobile computing include all of the existing vertical market applications for GPS, such as survey and mapping, marine and avionics navigation, and tracking; and, all of these areas will be enhanced by the emergence of powerful, cost-effective mobile computing platforms like the AT&T EO Personal Communicators and IBM ThinkPad. Moreover, the pervasive use of mobile computers is expected to expand the use of GPS into horizontal market applications for both business and consumer users.
 The basis of the API is the application that was developed by PenStuff and the University of Florida in conjunction with Trimble and IBM. First demonstrated by IBM at the Fall 92 Comdex show, the program was used to help coordinate clean-up efforts and that damage assessment following Hurricane Andrew in Florida. The API is an open standard that defines classes, messages and data structures so GPS hardware manufacturers and third-party software developers can design GPS applications.
 "There has been enough mobile computing activity involving GPS to warrant development of a standard interface," said Bill Dussell of Trimble. "Rather than make every developer re-invent the wheel, we felt it was in the industry's best interests to help develop a standard interface that could be used by all PenPoint developers. By using this API, the software developer does not need to become a GPS expert to exploit the functions and benefits of GPS."
 AT&T Microelectronics' interest in supporting the API, according to Diana Bury, ISV marketing manager, Personal Communications Systems, is to enable "new and different applications on the personal communicator platform based on AT&T's Hobbit microprocessor and GO's PenPoint operating system."
 Alain Rossmann, chief executive officer of EO Inc., added, "This API will allow the AT&T EO Personal Communicator to solve a whole new class of problems for customers. This expands the usefulness of the Personal Communicator into new markets."
 PenStuff and Trimble will offer a PenPoint software development kit (SDK) based on the API in August. The SDK will let software developers quickly integrate GPS into their PenPoint applications. It will include an installable service and sample source code developed by PenStuff and use a Trimble Mobile GPS(TM) PCMCIA Type 2.0 Sensor.
 NOTE: Trimble Navigation is a world leader in the emerging commercial markets for satellite-based navigation and positioning, and communication data products. These products are sold in a variety of markets including marine, aviation, vehicle tracking, survey and mapping, public safety and military. Founded in 1978 and located in Sunnyvale, Calif., Trimble has been a leader in commercial GPS since 1984.
 AT&T Microelectronics, Personal Communications Systems, located in Santa Clara, Calif., designs, manufactures and markets the Hobbit family of processors or personal communicator applications. GO Corp., a privately held company in Foster City, Calif., develops, market and supports PenPoint, its pen-based operating system for mobile applications. PenStuff Inc., a privately held company in Rochester, N.Y., is a developer of field data collection applications for mobile computing.
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 /CONTACT: Bill Dussell, 408-481-8915, or Barbara Thomas, 408-481-7808, both of Trimble Navigation; or Ken Dennard of Morgen- Walke, 415-296-7383, for Trimble Navigation/
 (TRMB T IBM)


CO: Trimble Navigation Inc.; AT&T; IBM; PenStuff; GO Corp. ST: California, New York IN: TLS CPR SU: PDT

TM-SG -- SF001 -- 6503 06/29/93 06:30 EDT
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Date:Jun 29, 1993
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