| Name | Country | City | Rating | |
|---|---|---|---|---|
| Concepts for Darren | 0.00 ±0.0 | |||
| Concom Enterprises | 0.00 ±0.0 | |||
| Condortronic | 0.00 ±0.0 | |||
| Conduit | 0.00 ±0.0 | |||
| Continental Adventures | 0.00 ±0.0 | |||
| Continental Press, Inc. | 0.00 ±0.0 | |||
| Control Data Corporation | 0.00 ±0.0 | |||
| Cornelius Miller | 0.00 ±0.0 | |||
| Coronado Publishers, Inc. | 0.00 ±0.0 | |||
| Cosine | United Kingdom | 0.00 ±0.0 | ||
| Cosmi | 0.00 ±0.0 | |||
| Counter Software | 0.00 ±0.0 | |||
| Counterpoint Software | 0.00 ±0.0 | |||
| Courbois Software | 0.00 ±0.0 | |||
| Covox, Inc. | 0.00 ±0.0 | |||
| CPS | 0.00 ±0.0 | |||
| CPU | 0.00 ±0.0 | |||
| Craig R. Preator | 0.00 ±0.0 | |||
| CRC Software | 0.00 ±0.0 | |||
| Creative Computing | 0.00 ±0.0 |
