| ID | Name | Type |
|---|---|---|
| #16109 | Corin Howitt | + |
| #2793 | Corinne Stockley | ? |
| #17193 | Cornforth Marketing Services | M |
| #2794 | Cornhill Services | Z |
| #2795 | Cornsoft | Z |
| #2796 | Cornsoft Group Inc | Z |
| #21276 | Coronado Games | P |
| #2797 | Corporation AS/DS | Z |
| #2798 | Corrado Zanella | ? |
| #2799 | Corrupt Code | ? |
| #20425 | Corse Hair Softwares | P |
| #2800 | Corvax | ? |
| #2801 | Corwen Computer Systems | Z |
| #2802 | Cosgrove Hall Films | ? |
| #2803 | Cosgrove Hall Productions Ltd | Z |
| #2804 | Cosine Systems | Z |
| #18311 | Cosma | P |
| #2805 | Cosmic Cockerel | Z |
| #2806 | Cosmic Pop | ? |
| #2807 | Cosmic Software | Z |