| Abbreviation | Definition |
|---|---|
| COA | Compliance Oriented Architecture |
| COAR | Consumption Of Available Redundancy |
| COAX | CO-AXial |
| COBRA | COntrolled Boosting for Rapid response Applications |
| COD | Cylinder On Demand |
| COLO | Colocation |
| COM | COMmunications (port) |
| COM | Computer Output on Microfilm |
| COM1 | Communications Port 1 |
| COM2 | Communications Port 2 |
| COMA | Cache Only Memory Architecture |
| ComCam | COMputer CAMera |
| COMDEX | Computer Dealers Exposition |
| COMPUTER | Common Operating Machine Particularly Used for Trade, Education, and Research |
| COP | Center Of Pen |
| COP | Coil On Plug |
| COP | Controller Operating Properly |
| COP | CPU (Central Processing Unit) Overheating Protection |
| COTS | Commercial Off The Shelf |
| CP | Central Processor |