| Copy Number Alteration | Academic & Science |
| Canadian Numismatic Association | Academic & Science |
| Association Canadienne de Numismatique | Academic & Science |
| Cisco Networking Academy | Academic & Science |
| Colistin Naladixic Acid | Academic & Science |
| Columbia Naladixic Acid | Academic & Science |
| Cananea | Airport Code |
| Centrica | Business |
| Coal & Allied Industries Ltd | Business |
| Certified Nurse Assistant | Business |
| Certified Nursing Aide | Business |
| Certified Nurses Asst | Business |
| C N A Financial Corporation | Business |
| Customer Name and Address | Business |
| Certified National Accountant | Business |
| Certified Nurses Aide | Business |
| Certified Nut Amanda | Certifications |
| Catholic News Agency | Community |
| Channel News Asia | Community |
| Comprehensive Needs Assessment | Community |
| Child Nutrition Act | Community |
| Conferencing News And Analysis | Community |
| CT Nurses Association | Community |
| Colorado Nurses Association | Community |
| Central News Agent | Community |
| Convention News Agency | Community |
| Camp Nintendo Admininstrator | Community |
| Converged Network Adapter | Computing |
| Computer Network Administration | Computing |
| Communication Network Architecture | Computing |
| Computer Network Architecture | Computing |
| Certified Novell Administrator | Computing |
| Certified Netware Administrator | Computing |
| Connecting Network Access | Computing |
| Certified Netware Associate | Computing |
| Cisco Network Assistance | Computing |
| Communications Network Application | Computing |
| Cloud Native Application | Computing |
| Certified Network Architect | Computing |
| Customer Name Address | General |
| Center for Nonlinear Analysis | General |
| Capital Needs Assessments | General |
| Create N Amaze | General |
| Cota Nodal Address | General |
| Capital Needs Assessment | General |
| Chevrolet Nomad Association | General |
| Comision Nacional de Aceleracion | General |
| Campeonato Nacional de Automovilismo | General |
| Competent National Administration | General |
| Customer Name Amp | General |
| Clueless Network Administrator | General |
| Currently Not Available | General |
| Craft And Needlework Age | General |
| Clean Nasty Asses | General |
| Center for Naval Analyses | Governmental |
| Commander's Narrative Analysis | Governmental |
| China News Agency | Governmental |
| CVE Numbering Authorities | Governmental |
| Center Of Naval Analyses | Governmental |
| Chinese Nationalist Alliance | Governmental |
| CHANDERIYA | Indian Railway Station |
| Comisión Nacional del Agua | International |
| Chuck Norris Approved | Internet |
| Certified Network Associate | Jobs |
| Certified Nurses Assistant | Jobs |
| Certified Nurse Aide | Jobs |
| Certified Nursing Assistant | Jobs |
| Certified Nurse Anesthetist | Medical |
| Canadian Nurses Association | Medical |
| Certified Nurse Assistants | Medical |
| Certified Nursing Assistants | Medical |
| Cute Nursing Assistant | Medical |
| Consolidated Nurse Aide | Medical |
| Certifed Nursing Assistant | Medical |
| Certified Nursing Assistance | Medical |
| Career Nursing Assistant | Medical |
| California Nurses Association | Medical |
| Certified Nurse Aid | Medical |
| Computer Network Attack | Military and Defence |
| Center for Naval Analysis | Military and Defence |
| Cisco Network Accessory | Networking |
| Central North America | Regional |
| Central News Agency | Regional |
| Called Number Authority | Telecommunication |
| Cell Not Available | Telecommunication |