| Abbreviation | Definition |
|---|---|
| COM1 | COMmmunications port 1 |
| COMPASS | COMPuter ASSurance Conference |
| CONFT | CONFigure Terminal |
| COP | Coda Optimistic Protocol |
| COPE | Client Oriented Provider Efficient |
| COPS | Common Open Policy Service |
| COR | Central Outdoor Router |
| CORA | COlorado Research Associates |
| CORBA | Common Object Request Broker Architecture |
| COS | Central Operating System |
| COS | Class Of Service |
| COS | Common Object Services |
| COS | Cost Of Service |
| COSINE | Cooperation for Open Systems Interconnection Networking in Europe |
| COTS | Connection Oriented Transport Service |
| COW | Cluster Of Workstations |
| CPA | Central Point of Administration |
| CPA | Content Provider Access |
| CPC | Computer Print Control |
| CPE | Communication Protocol Exchange |