Oak (programming language)
Oberon-2
Oriel (scripting language)
Oz (programming language)
Page Interchange Language
Python (programming language)
Visual Basic
ABC Software
Altamira Software
Art Technology Group
Avaloq
AVG Technologies
Georgia SoftWorks
Gryphon Software Morph
HCL Technologies
Hyland Software
Jasc Software
Onward Technologies
OpenText
Pegs'n Co
Persistence Software
Text Control
Unix System Laboratories
Walnut Creek CDROM
The 3DO Company
Acclaim Studios Austin
Alchemist (company)
Aspect Co.
Atlus USA
Bungie
Digital Pictures
Digital Reality
Epic Games
GameHouse
Id Software
Lesta Studio
Nippon Ichi Software
Radical Entertainment
Sega AM3
Silicon Sorcery
SIMS Co., Ltd.
Sonic Team