| Abbreviation | Definition |
|---|---|
| CHRC | Criminal History Records Checks |
| CHRI | Criminal History Record Information |
| CHRI | Criminal History Report Information |
| CHRR | Criminal History Record Report |
| CHRU | Criminal History Review Unit |
| CHS | Centre of Historical Studies |
| CHSA | Chinese Historical Society of America |
| CHSA | Construction History Society of America |
| CHSB | Criminal History Systems Board (Massachusetts) |
| CHSI | Collection of Historical Scientific Instruments |
| CHSS | Comparative Historical Social Sciences |
| CHWR | Conference on the History of Women Religious |
| CICH | Consortium for Intellectual and Cultural History |
| CIH | Center for International History |
| CIMH | Centre for Indian Military History |
| CINCH | Council for Interpreting North County History |
| CLAH | Conference On Latin American History |
| CLH | Clear Login History |
| CLHD | Centre for Linguistic History and Diversity |
| CLHR | Centre for Legal History Research |