| Acronym | Definition |
|---|
| CTN | Carton |
| CTN | Clinical Trials Network (NIDA) |
| CTN | Cartoon Network |
| CTN | Código Tributário Nacional (Brazilian National Tax Code) |
| CTN | Christian Television Network |
| CTN | Central Test Node |
| CTN | Community Television Network |
| CTN | Canadian Technology Network |
| CTN | Consumers' Telecommunications Network (Australia) |
| CTN | Croatia Airlines (ICAO code) |
| CTN | Cambodian Television Network |
| CTN | Cable Television Network |
| CTN | Can't Talk Now |
| CTN | Certified Traditional Naturopath |
| CTN | Canadian Television Network (before 1962) |
| CTN | Central de Trabajadores de Nicaragua (Spanish: Nicaraguan Workers' Central) |
| 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 | Coordinated Timing Network (IBM) |
| CTN | Customer Telephone Number |
| CTN | Cellular Telephone Network |
| CTN | Certification Test Network (NASA) |
| CTN | Corporate Telecommunications Network |
| CTN | Co-Tangent |
| CTN | Compensated Twisted-Nematic |
| CTN | Case/Throat/Nozzle (rocket motor component) |
| CTN | Consumer Trend News (online magazine) |
| CTN | Critical Technologies Newsletter |
| CTN | Composite Tactical Network |
| CTN | Count-Transmission Number |
| CTN | Contactless Technology Network |
| CTN | Computerized Telephony Network |
| CTN | Certified Transplant Nurse |
| CTN | Commercial Type Number |
| CTN | China Teanet |
| CTN | Customer Transaction Note |
| CTN | Core Transmission Network |
| CTN | Continuous Tone Negative(s) |
| CTN | Confectionary, Tobacco and News (retail) |
| CTN | Comparable to None Entertainment (record label) |
| CTN | Commission Technique Nationale (French: National Technical Commission) |
| CTN | Coefficient de Température Négatif (French: Negative Temperature Coefficient) |
| CTN | Centre des Technologies Nouvelles (French: New Technologies Center) |
| CTN | Cargo Tracking Note (shipping) |
| CTN | Computer Technology News (publication) |
| CTN | Compagnie Tunisienne de Navigation (French: Tunisian Navigation Company; Tunisia) |
| CTN | Créations et Techniques Nouvelles (French: Creations and New Techniques) |
| CTN | Comité Technique National (French: National Technical Committee) |