- (Sierra) On-Line
- 3Com
- Activision
- Adventure International
- Apple – Special Delivery Software
- Apple Computer
- Avalon Hill
- Avant-Garde
- Beagle Bros
- Blue Chip
- Box Office
- Brøderbund
- BudgeCo
- Byte Works
- Cavalier Computer
- CBS
- Computer Programs Unlimited
- Computer Station
- Cosmi
- Creative Computing
- Dashing Falcon
- Datamost
- Dataplan
- Datasoft
- E.S.R.
- Edu-Ware
- Educational Publishing Concepts
- Electric Transit
- Electronic Arts
- Energy Games
- Epyx / Automated Simulations
- Firebird
- Funtastic
- Gardé
- Hayden
- High Technology
- Infocom
- Intelligent Statements
- Interplay
- K-Tek / General Masters
- Laser
- Lucasfilm
- Masterplay
- Masterworks
- MCX
- Micro Fun
- Micro Lab
- Microprose
- Milton Bradley
- Mindscape
- Minnesota Educational Computing Consortium (MECC)
- MUSE
- Opportunities for Learning, Inc.
- Origin
- Penguin Software
- Piccadilly Software
- Radio Shack
- Rainbird
- RockRoy
- Sears
- Sentient Software
- Sharedata
- Simon & Schuster
- Simulations Canada
- Sir-tech
- Sirius Software
- Softkey
- Strategic Simulations, Inc. (SSI)
- subLOGIC
- Sun Remarketing
- Synapse
- Synergistic Software
- Telarium
- Thunder Mountain
- Titan Technologies
- Trillium
- Windham Classics
- XPS