| ID | Name | Type |
|---|---|---|
| #13408 | SirotaSoft | Z |
| #17706 | Siskin Electronics | H |
| #23160 | Sisko Lopez | + |
| #13409 | Sistemas de Informatica e Som Ltda | Z |
| #13410 | Sito Pons | - |
| #17707 | Sitron Associates | R |
| #13411 | Sitting Bull Software | Z |
| #17708 | Sivco Designs | S |
| #13412 | Sivis | Z |
| #13413 | Sixword Ltd | Z |
| #19753 | Siyei-Er | - |
| #13414 | Sizzlers | Z |
| #13415 | Skill Master | - |
| #17709 | Skinflints Computers | S |
| #13678 | Skippy | - |
| #13416 | Skorpyo | Z |
| #13417 | Skriptorium Verlag | Z |
| #21881 | Skult | P |
| #13418 | Skusoft | Z |
| #13419 | Sky | Z |