| Abbreviation | Definition |
|---|---|
| CIE | Collaborative Information Environment |
| CIED | Counter Improvised Explosive Device |
| C-IED | Counter-Improvised Explosive Device |
| CIEG/CIEL | Common Information Exchange Glossary and Common Information Exchange Language |
| CIF | Candidate Item File |
| CIF | Capital Improvement Fund |
| CIF | Central Issue Facility |
| CIF | Corps Information Flow |
| CIFA | CounterIntelligence Field Activity |
| CIG | Communications Interface Group |
| CIG | Computer Image Generator |
| CIGTF | Central Inertial Guidance Test Facility,Holloman AFB, NM |
| CIHO | Counter-Intelligence/HUMINT (Human Intelligence) Officer |
| CII | Configuration Identification Index |
| CII | Configuration Item Identification |
| CIIB | Corporate Information Integration Board |
| CIIIR | CI Intermediate Interrogation Report |
| CIIP | Clothing Initial Issue Point |
| CIIR | Counter-Intelligence Information Report |
| CIL | Command Information Library |