| Name | Country | City | Rating | |
|---|---|---|---|---|
| Signet Book | United States | New York | 0.00 ±0.0 | |
| Sikor Soft | Poland | 0.00 ±0.0 | ||
| SilentSoft | 0.00 ±0.0 | |||
| Silicon Joy | 0.00 ±0.0 | |||
| Silicon Valley Systems | 0.00 ±0.0 | |||
| Silver Burdett and Ginn, Inc. | 0.00 ±0.0 | |||
| Silver Burdett Company | 0.00 ±0.0 | |||
| Silver Creek Observatory | 0.00 ±0.0 | |||
| Sim Computer Products, Inc. | 0.00 ±0.0 | |||
| Simon & Schuster | 0.00 ±0.0 | |||
| Simon Software | 0.00 ±0.0 | |||
| SimpleSoft | 0.00 ±0.0 | |||
| Simplex Software | 0.00 ±0.0 | |||
| Sir Video | 0.00 ±0.0 | |||
| Sir-Tech Software, Inc. | 0.00 ±0.0 | |||
| Sirius Software | 0.00 ±0.0 | |||
| Sirius Synthesis | 0.00 ±0.0 | |||
| SIS | 0.00 ±0.0 | |||
| SISTAP | 0.00 ±0.0 | |||
| Sitsoft | 0.00 ±0.0 |
