| Abbreviation | Definition |
|---|---|
| CRMTS | Costa Rica Medical Tourism Services |
| CRS | Car Rental Sofware |
| CRT | Culture Recreation and Tourism |
| CRTG | Collaborative Research Travel Grants |
| CRTR | Centre for Recreation and Tourism Research |
| CSFR | Colegio Santa Francisca Romana |
| CSR | Corporate Social Responsibility |
| CSS | Car Sharing Scheme |
| CSTI | Cyprus Sustainable Tourism Initiative |
| CSTN | Connecting Solo Travel Network |
| CSTP | Certified Student Travel Professional |
| CTA | Candidate Travel Award |
| CTA | Certified Tourism Ambassador |
| CTA | Certified Tourism Ambassadors |
| CTA | Certified Tourism AmbassadorTM |
| CTAG | Corporate Travel Action Group |
| CTASA | Community Tourism Association of South Africa |
| CTB | Curaçao Tourist Board |
| CTC | Commonwealth Tourism Centre |
| CTFP | Counter Terrorism Fellowship Program |