| ID | Name | Type |
|---|---|---|
| #16101 | Clare Edgeley | + |
| #16102 | Clare Gurton | + |
| #2555 | Clare Spottiswoode | ? |
| #17141 | Clarence Computers | A |
| #19540 | Clarity Software Ltd | Z |
| #2557 | Clas Kristiansson | ? |
| #2558 | Clasic | ? |
| #2559 | Clasic Software | Z |
| #2560 | Class Games | Z |
| #20435 | Classic Computing | P |
| #2561 | Classic Conflicts | Z |
| #2562 | Classic Software | Z |
| #16694 | Classified Product Services | Z |
| #17142 | Classified Products & Services | H |
| #2563 | Claude J. DeRossi | + |
| #2564 | Claude Sablatou | + |
| #16103 | Claudia Cooke | + |
| #2565 | Claudio Cimini | + |
| #2566 | Claudio Marciano | + |
| #2567 | Claudio Mazzuco | + |