| ID | Name | Type |
|---|---|---|
| #2760 | Comse | ? |
| #17191 | Comsoft Mail Order | S |
| #17192 | Comtrax Computer Software | S |
| #18773 | Con Aslanis | + |
| #2761 | Conan | ? |
| #2763 | Concept Animations | Z |
| #2764 | Concept Software Ltd | Z |
| #2765 | Concern Chaos | ? |
| #2766 | Concord | ? |
| #2767 | Concrete Digital Designs | Z |
| #20094 | Connor [Bearsden Primary 2021] | - |
| #15808 | Conor Brophy | + |
| #2768 | Conor O'Neill | ? |
| #21434 | Conrad Jagger | + |
| #2769 | Conrado Badenas Mengod | ? |
| #2770 | Conradorre Soft | Z |
| #19178 | Conscience | - |
| #23215 | Consciousness | Z |
| #2771 | Consolidated Software Marketing Ltd | Z |
| #2773 | Consult Computer Systems | Z |