P

Pacific Data Products
Paradise Software
PictureTalk
PinPoint Software
PointCast
PowerQuest
Precept Software
Process Software
Proginet
Proteon
Proxim

Puzzle Systems
Pyramid Technology

Q

Quarterdeck Office Systems

R

RDI Computer
Racal-Datacom
Raxco
Real Time Integration

S

S&S International
SAP America
Saint Bernard Software
Santa Cruz Organization (SCO)
SciNet
Seattle Lab
Sequent Computer Systems
Shiva
Shomiti Systems
Siemens Nixdorf
Siemens
Silicon Graphics
Simware
Software Artistry
Software Clearing House (SCH)
Softway Systems
Somar Software
Spyglass
Stac Electronics
Standard Microsystems Corporation (SMC)
StarNine Technologies
StarWare
Starlight Networks
Sterling Software
StorageTek Network Systems Group
Storage Technology
StrataCom
Sun Microsystems
SyStemix Software
Symantec
Syncsort
Syntax
System Management ARTS / SMARTS