| ID | Name | Type |
|---|---|---|
| #13276 | Silicon Joy | P |
| #13277 | Silicon Kid | Z |
| #17699 | Silicon Services | R |
| #17700 | Silicon Shack | S |
| #13278 | Silicon Software | P |
| #13279 | Silicon Tricks | ? |
| #15950 | Silmarils | ? |
| #13280 | Silva Soft | Z |
| #13281 | Silver Fox Communications Ltd | P |
| #13282 | Silver Star Group | Z |
| #19797 | Silver Sword Software | P |
| #13283 | SilverTime Inc | Z |
| #13284 | Silverbird Software Ltd | P |
| #17701 | Silverdawn | A |
| #13285 | Silverlind Ltd | M |
| #13286 | Silversoft Ltd | P |
| #20419 | Silvia Benzi | + |
| #22206 | Silvia O'Brien | + |
| #13287 | Silvio Crispiatico | + |
| #13288 | Silvio U. Zanzi | + |