| #2303 | Celulosa Fabril S.A. | Z |
| #2304 | Celyn Jones Software | Z |
| #16693 | Censcot | ? |
| #2305 | Centas | Z |
| #2306 | Centaurisoft | Z |
| #2307 | Central Electronics | Z |
| #2308 | Central Independent Television PLC | Z |
| #2309 | Central Solutions | P |
| #2310 | Central Television | Z |
| #17131 | Centralised Services | R |
| #2311 | Centre Divulgador de la Informatica | Z |
| #2312 | CentreSoft | S |
| #21174 | Centro Brasileiro de Informatica | Z |
| #2313 | Centuri | ? |
| #2314 | Century City Software Ltd | Z |
| #2315 | Century Communications Ltd | P |
| #2316 | Century Electronics Ltd | Z |
| #2317 | Century Publishing Co. Ltd | Z |
| #2319 | Century Software [ES] | Z |
| #2318 | Century Software [UK] | Z |