| Acronym | Definition |
|---|
| CTN | Carton |
| CTN | Clinical Trials Network (NIDA) |
| CTN | Código Tributário Nacional (Brazilian National Tax Code) |
| CTN | Cartoon Network |
| CTN | Community Television Network |
| CTN | Christian Television Network |
| CTN | Canadian Technology Network |
| CTN | Consumers' Telecommunications Network (Australia) |
| CTN | Croatia Airlines (ICAO code) |
| CTN | Can't Talk Now |
| CTN | Central Test Node |
| CTN | Cambodian Television Network |
| CTN | Certified Traditional Naturopath |
| CTN | Cable Television Network |
| CTN | Central de Trabajadores de Nicaragua (Spanish: Nicaraguan Workers' Central) |
| CTN | Canadian Television Network (before 1962) |
| CTN | Commercial Technology Network (NASA) |
| CTN | Cryptologic Technician Networks (Navy rating) |
| CTN | CALS Test Network |
| CTN | Christian Therapists Network |
| CTN | Charity Trustees Network |
| CTN | Call to Needle Time (healthcare performance indicator; UK) |
| CTN | Campus Television Network (University College Dublin student run TV channel) |
| CTN | Corporate Telecommunications Network |
| CTN | Cellular Telephone Network |
| CTN | Certification Test Network (NASA) |
| CTN | Co-Tangent |
| CTN | Compensated Twisted-Nematic |
| CTN | Case/Throat/Nozzle (rocket motor component) |
| CTN | Customer Telephone Number |
| CTN | Confectionery, Tobacconist, and Newsagent (UK retailer) |
| CTN | Consumer Trend News (online magazine) |
| CTN | Critical Technologies Newsletter |
| CTN | Core Transmission Network |
| CTN | Computerized Telephony Network |
| CTN | Certified Transplant Nurse |
| CTN | Contactless Technology Network |
| CTN | Count-Transmission Number |
| CTN | Composite Tactical Network |
| CTN | Commercial Type Number |
| CTN | Continuous Tone Negative(s) |
| CTN | Customer Transaction Note |
| CTN | China Teanet |