| ID | Name | Type |
|---|---|---|
| #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 |
| #18560 | Cosmin Parligras | + |
| #20512 | Cosmium | P |
| #2808 | Costa Panayi | + |
| #17194 | Cotrel | R |
| #2809 | Cottage Computing | Z |
| #17195 | Cottage Software | S |
| #2810 | Cottbus | ? |