| ID | Name | Type |
|---|---|---|
| #2146 | Cambridge Computing Research Ltd | H |
| #15796 | Cambridge Learning | Z |
| #2147 | Cambridge Micro Software | Z |
| #2148 | Cambridge Microcomputer Centre | Z |
| #2149 | Cambridge Microelectronics | Z |
| #2150 | Cambridge Research | Z |
| #2151 | Cambridge University Press | Z |
| #2152 | Camden Council | Z |
| #2153 | Camel Micros | ? |
| #2155 | Camel Products | P |
| #2156 | Camel Software | Z |
| #2157 | Cameron Hayne | + |
| #2158 | Camille van der Heide | + |
| #2159 | Camilo Cela Elizagarate | + |
| #19574 | Camilo Eid | + |
| #17120 | Camp Beaumont | C |
| #2160 | Campbell Systems | Z |
| #2161 | Campion Software | Z |
| #2162 | Canaan Software | Z |
| #2163 | Canadul | ? |