| Abbreviation | Definition |
|---|---|
| CTCC | Colorado Technical Conference Center |
| CTCI | China Technical Consultants Inc |
| CTCL | Citicorp Trustee Company Limited |
| CTD | Center for Talent Development |
| CTD | Corporate Travel Department |
| CTDC | Caribbean Tourism Development Corporation |
| CTDI | Communications Test Design Inc |
| CTEC | Cable Tramway Engineering Company |
| CTEC | Certified Technical Education Center |
| CTEP | Central Treatment Export Plant |
| CTF | Cruise The Falls |
| CTFC | Colville Tribal Federal Corporation |
| CTFSF | Community Television Foundation of South Florida, Inc. |
| CTGC | China Three Gorges Corporation |
| CTH | Canny Technologies |
| CTI | Carpenter Tools International |
| CTI | Chartered Translators Ireland |
| CTI | Chemical Transportation Inc |
| CTI | City Taxi Institute |
| CTI | Columbia Tristar Interactive |