 Certified Netware Administrator | Technology |
| Computer Network Attack | Military |
| Canadian Nuclear Association | Science |
| Canadian Nurses Association | Medical |
| Center for Naval Analyses | Military |
| Certified Network Administrator | Technology |
| Certified Nursing Assistant | Medical |
| Cosmic Noise Absorption | Common |
| Cache-No-Allocate | Common |
| Cadmium Neodymium Aluminate | Common |
| Calcineurin AA | Medical |
| Calcium Neodymium Aluminate | Common |
| California Nurses Association | Medical |
| Canadian National Railway | Organizations |
| Canadian Naturopathic Association | Medical |
| Capital Need Analysis | Business |
| Capital Needs Assessment | Business |
| Cascaded Network Architecture | Common |
| Center for Naval Analysis | Military |
| Central Nucleus | Medical |