| ID | Name | Type |
|---|---|---|
| #2108 | CO | ? |
| #2109 | COOK | ? |
| #19992 | COPE-Soft | P |
| #2110 | CORE Design Ltd | P |
| #2111 | COSM-J2+ | ? |
| #20070 | COSMON Software | S |
| #2112 | COSMOS designers | Z |
| #21340 | CP | P |
| #2113 | CP Software | P |
| #2114 | CPC | ? |
| #2115 | CPL Computer Plus Soft GmbH | Z |
| #2116 | CPL Computing | Z |
| #2117 | CPS | ? |
| #17116 | CR Electronics | S |
| #2120 | CRC Software | Z |
| #2121 | CRG | ? |
| #2122 | CRL Group PLC | P |
| #17117 | CS Software | S |
| #2123 | CS-Setup | ? |
| #16007 | CSC | P |