| Abbreviation | Definition |
|---|---|
| CMT | Chartered Market Technician |
| CMT | Certified Medical Transcriptionist |
| CMT | Cancer Multistep Therapy |
| CMTS | Computerized Maintenance Test System |
| CMU | Concrete Masonry Unit |
| CMV | Cytomegalovirus |
| CMV | CytoMegalo Virus |
| CMW | Compartmented Mode Workstation |
| CMY | Cyan Magenta Yellow |
| CMYK | Cyan, Magenta, Yellow, Black |
| CMYK | Cyan Magenta Yellow Black |
| CN | Cranial Nerve |
| CN | Clinical Nutrition |
| CN | Cellulose Nitrate |
| CNA | Certified Nurse Aide |
| CNAP | Certified Nonprofit Accounting Professional |
| CNAP | Career Nurse Assistants' Programs |
| CNC | Certified Nutritional Consultant |
| CNC | Custody And Clearing |
| CND | Concerned Nervous Disorder |
| CND | Commission on Narcotic Drugs |
| CND | Certid |
| CND | Cash on Next Delivery |
| CNE | Certified Netware Engineer |
| CNE | Certified Network Engineer |
| CNE | Create New Election |
| CNEN | County Non Emergency Number |
| CNES | Centre National D'Etude Spatiales |
| CNES | Centre Nationale d'Etudes Spatiales |
| CNET | Community Narcotics Enforcement Team |
| CNEXO | Centre National pour l'Exploitation des Oceans (France) |
| CNG | Compressed Natural Gas |
| CNI | CalciNeurin Inhibitor |
| CNI | Coalition for Networked Information |
| CNI | Chronic Nerve Irritation |
| CNIDR | Center for Networked Information Discovery and Retrieval |
| CNIF | Californium Neutron Irradiation Facility |
| CNK | Cortical Necrosis Of Kidneys |
| CNL | Chronic Neutrophilic Leukemia |
| CNLM | Center for Natural Lands Management |
| CNM | Certified Nurse Midwife |
| CNMA | Canadian New Media Awards |
| CNMOC | Commander, Naval Meteorology and Oceanography Command |
| CNMPS | Canadian Minimum Navigation Performance Specification Airspace |
| CNN | Cable News Network |
| CNO | Carbon Nitrogen Oxygen |
| CNO | Carbon Nitrogen And Oxygen |
| CNO | Chief of Naval Operations |
| CNO | Chief Networking Officer |
| CNO | Carbon-Nitrogen-Oxygen |