B Bitstream Bluestone Bristol Technology
C CenterLine Software Claris Coryphaeus Software Cygnus Support
D Data Access Data I/O Data Translation DataBeam DataFocus Dataware Technologies Delrina Diamond Head Software Digital Equipment Corporation / DEC Dragon Systems
E Eagle Research Eicon Technology Encore Computer Expersoft
ACI
ADAC
AMT
Learning Solutions Abraxas
Software Advanced
Visual Systems / AVS Agenetics
AimTech
Alpha
Logic Technologies Alpha
Microsystems Altera
American
Cybernetics Apex
Software Apple
Computer 
