| | cih | | cash in hand |
| | cil | | common intermediate language. |
| | cil | | critical items list |
| | ciopw | | charcoal, ink, oil, pencil, watercolour |
| | cis | | Compuserve Information Service |
| | cis | | computer information science |
| | cis | | Customer Information Systems |
| | cisc | | complex instruction set computers |
| | CISG | | Contracts for the International Sale of Goods |
| | CISW | | Certified Independent Social Worker |
| | CITD | | center for international trade development |
| | CITD | | counter intelligence and terrorism division |
| | ciwwaf | | Cute Is What We Aim For |
| | CKIM | | Certified Knowledge and Innovation Manager |
| | CLAT | | Common Law Admission Test |
| | cli | | caller line identification |
| | cli | | calling line identification |
| | cli | | command line interface |
| | clie | | communication, link, information and entertainment |
| | CMA | | Call Me Already |
| | CMA | | comparative market analysis |
| | CMA | | Cover My Ass |
| | CMAP | | Cover My Ass Partner |
| | CMAU | | cracking my ass up |
| | cmaw | | Construction, Maintenance and Allied Workers Union |
| | cmcp | | call my cell phone |
| | cmeo | | crying my eyes out |
| | CMH | | Call My House |
| | CMH | | Cross My Heart |
| | CMIIAW | | Correct Me If I Am Wrong |
|