| Abbreviation | Definition |
|---|---|
| CIMC | Center For Instructional Materials Computing |
| CIN | Console Input Notice |
| CIO | Computer Integrated Office |
| CIR | Committed Information Rate |
| CIRC | Cross-Interleaved Reed-Solomon Code |
| CIRCA | Conceptual Information Retrieval And Communication Architecture |
| CIRCE | Computing In a Roving Chaotic Environment |
| CIS | Card Information Structure |
| CIS | Character Information Sheet |
| CIS | Computer Information Systems |
| CIS | Conversion Indexing Sorting |
| CISA | Certified Information Systems Auditor |
| CISC | Complex Instruction Set Computing |
| CISR | Customer Information Service Request |
| CIT | Cobol Intermediate Temporary |
| CIT | Computer Information Technologies |
| CIT | Computer Information Technology |
| CIT | Computer Installation Tutorials |
| CIT | Computer Integrated Telephony |
| CITP | Certified Information Technology Professional |