| Cape Hatteras Electric Cooperative | Academic & Science |
| Commonwealth Human Ecology Council | Academic & Science |
| China Harbour Engineering Company | Business |
| Consumer Health Expense Coverage | Business |
| Collin Higher Education Center | Community |
| Community Health Education Complex | Community |
| Community Health Environment Checklist | Community |
| Curtis Heritage Education Center | Community |
| Community Housing and Employment Coop | Community |
| Christian Home Educators Connection | Community |
| Christian Higher Education Canada | Community |
| Community Housing and Employment Cooperative | Community |
| Child Health Evaluation And Care | Community |
| Children's Health Environmental Coalition | Community |
| Christian Home Educators of Colorado | Community |
| Creating Health Environments for Children | Community |
| CHicago Episcopal Cursillo | Community |
| Christian Home Educators of Cincinnati | Community |
| Christian Home Educated Children | Community |
| Cape Higher Education Consortium | Community |
| Coffs Harbour Education Campus | Community |
| Consumer Health Education Council | Community |
| Comprehensive Home Energy Curriculum | Community |
| Community Health Education Center | Community |
| Columbia Heights Educational Campus | Community |
| checkered | General |
| Checker | General |
| Charlotte Harbor Environmental Center | Governmental |
| Compact High Energy Camera | Governmental |
| Combustion and Harmful Emission Control | Governmental |
| Checkered (buoy) | Governmental |
| Childhood Health Evaluation And Care | Medical |
| Canadian Hospital Epidemiology Committee | Medical |
| Certified Hospital Emergency Coordinator | Medical |