| ID | Name | Type |
|---|---|---|
| #2532 | Church of the Latter Day Speccy | Z |
| #17138 | Chyme Software | M |
| #2533 | Cianfanelli | ? |
| #16100 | Ciaran Brennan | + |
| #2534 | Ciaran Gultnieks | ? |
| #2535 | Cibercomp S.A. | Z |
| #2536 | Ciberne Software | Z |
| #2537 | Cibernesis | Z |
| #2538 | Cibertron Software | Z |
| #2539 | Cinema 84 | Z |
| #2540 | Cinematronics Inc | Z |
| #2541 | Cinemaware | Z |
| #2542 | Cinisello Balsamo | ? |
| #2543 | Cinto Ventura | ? |
| #20392 | Cinzia d''Ascenzo | + |
| #2544 | Circuit Design | Z |
| #2545 | Circulo de Soft | Z |
| #2546 | Ciriaco Ozquiaga Zardoya | ? |
| #2547 | Ciril Krasevec | + |
| #2548 | Cirkul | ? |