| Abbreviation | Definition |
|---|---|
| CIMI | Cloud Infrastructure Management Interface |
| CING | Construction Industry Networking Group |
| CINT | Center for Information Networking and Telecommunications |
| CIO | Chief Information Officer |
| CIP | Common Industrial Protocol |
| CIP | Common Isochronous Packet |
| CIP | Communicating Interacting Processes |
| CIPA | Children's Internet Protection Act |
| CIR | Communications Initiation Request |
| CIS | Compuserve Information Service |
| CIS | Computer Internet Server |
| CIS | Confederation of Independent Systems |
| CISD | Critical Incident Stress Debriefing |
| CISL | Common Intelligence Services Layer |
| CITS | Colorado Information Technology Services (State of Colorado) |
| CIVICS | Cooperative Interactive Video in Colorado State government |
| CIW | Climbing Installation Wizard |
| CIWIN | Critical Infrastructure Warning Information Network |
| CKS | Common Knowledge Server |
| CL | ConnectionLess |