- (Sierra) On-Line
- 3Com
- Aacksoft
- Access
- Activision
- Adventure International
- Apple – Cassette Software
- Apple – machines
- Apple – Special Delivery Software
- Apple Computer
- Artsci
- Ashton-Tate
- Avalon Hill
- Avant-Garde
- Beagle Bros
- BiTaction
- Blue Chip
- Box Office
- BrainBank
- Brøderbund
- BudgeCo
- Byte Works
- C.C. Publications
- Cavalier Computer
- CBS
- Compu-Teach
- Computer Programs Unlimited
- Computer Station
- Core Concepts
- Cosmi
- Creative Computing
- Dashing Falcon
- Datamost
- Dataplan
- Datasoft
- E.S.R.
- Edu-Cards
- Edu-Ware
- Educational Publishing Concepts
- Electric Transit
- Electronic Arts
- Energy Games
- Entrex Software
- Epyx / Automated Simulations
- Ernest L. Johnson
- Financial Software, Inc.
- Firebird
- Flight Opps
- Follett Library Book Company
- Funtastic
- Gardé
- Gebelli
- Geosystems
- Great Plains
- Grolier
- GRT
- Harper and Row
- Hayden
- High Technology
- Highlands Computer Services
- IDSI (Innovative Design Software, Inc.)
- IMAGE Computer Products
- Infocom
- Information Unlimited Software (IUS)
- Instant Software
- Intelligent Statements
- Interplay
- J&M Software
- J&S Software
- K-Tek / General Masters
- K-tel Software
- Knoware
- L&S Computerware
- Laser
- Learning Tools
- Leisure Genius
- Link Systems
- Living Legends Software
- Lucasfilm
- Magnetic Harvest
- Magnum Software
- Market Computing
- Masterplay
- Masterworks
- McCarthy-McCormack
- MCX
- Melbourne House
- Micro Fun
- Micro Lab
- Micro-Sparc
- Microprose
- Milton Bradley
- Mind Systems Corporation
- Mindscape
- Minnesota Educational Computing Consortium (MECC)
- Mountain Hardware
- MUSE
- Opportunities for Learning, Inc.
- Optimum Resource
- Origin
- Penguin Software
- Personal Software
- Piccadilly Software
- Plato Educational Courseware
- Prentice-Hall
- Programma
- Queue
- Radio Shack
- Rainbird
- Rainbow Computing
- Random House
- Real Software
- Reston Software
- Rhiannon Software
- RockRoy
- Sams
- Scientific Software Products
- Sears
- Sentient Software
- Sharedata
- Silver Burdett
- Simon & Schuster
- Simulations Canada
- Sir-tech
- Sirius Software
- Soft images
- Softape
- Softkey
- Softsmith
- Southwestern Data Systems
- Spinnaker
- Strategic Simulations, Inc. (SSI)
- Street Electronics Corp.
- subLOGIC
- Sun Remarketing
- Sunburst
- Synapse
- Synergistic Software
- Telarium
- Terrapin, Inc.
- Thunder Mountain
- Titan Technologies
- Tom Snyder Productions
- Trillium
- Troll Associates
- United Software of America
- Vernier Software
- Wiley
- WIMS Computer Consulting
- Windham Classics
- XPS