Simon & Schuster Interactive

Simon Hessel Software

Simon Micro-Soft

SimoneSystems

Simply Silly Software

SIMS Co., Ltd.

Simsalabim Software

SimSystems

SimTex, Inc.

Simulations Canada

Simulations Publications, Inc.

Simulmondo

Simutrek, Inc.

Simutronics Corporation

Sinclair Research Ltd.

sinewave.japan

Singee

Singer Corporation

Singing Electrons

SingleTrac Entertainment Technologies, Inc.

Sinister Games, Inc.

Sinosoft Limited

Sintax Technology Co., Ltd

Sintech

Sir Rah

Sir-tech Software, Inc.

Sirius Games A/S

Sirius Publishing, Inc.

Sirius Software, Inc.

Siro-tech

Sirtech Canada Ltd.

SIS Works

SIVEK

Six by Nine Ltd

Six Foot Two Productions

Six Pound Sledge Studios

Sixteen Tons Entertainment

Sizzlers

SKC Soft Land

Skill Art