- (Sierra) On-Line
- 3Com
- Activision
- Adventure International
- Apple – Special Delivery Software
- Apple Computer
- Avalon-Hill
- Avant-Garde
- Beagle Bros
- Blue Chip
- Box Office
- Brøderbund
- Byte Works
- Cavalier Computer
- CBS
- Computer Programs Unlimited
- Creative Computing
- Dashing Falcon
- Datamost
- Dataplan
- Datasoft
- Edu-Ware
- Educational Publishing Concepts
- Electric Transit
- Electronic Arts
- Energy Games
- Epyx / Automated Simulations
- Firebird
- Funtastic
- Hayden
- High Technology
- 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