| Abbreviation | Definition |
|---|---|
| COSIC | Computer Security and Industrial Cryptography |
| COSL | Campus Office of Software Licensing |
| COSL | Citicorp Overseas Software Limited |
| COSL | Citicorp Overseas Software Ltd |
| COSM | Composite Object Sound Modeling |
| COSMOS | C# Open-Source Managed Operating System |
| COSMOS | Cooperative Object Service Management for Open Systems |
| COSP | Committee On Stochastic Programming |
| COSQ | Cost of software quality |
| COSSAS | Community for Open Source Security Automation Software |
| COSST | Coast Open Source Software Technology |
| COST | Common Object Support Toolkit |
| COTB | Community Organizing ToolBox |
| COTS | commercial off-the-shelf software |
| COW | Check Out Wizard |
| CP | Common Programming |
| CP | Communication Protocols |
| CP/M | Control Program for Microcomputers |
| CPAB | Cultural Programming Advisory Board |
| CPACS | Collaborative Process Analysis Coding Scheme |