| Abbreviation | Definition |
|---|---|
| CTPL | Computer Technologies Pvt Ltd |
| CTRC | California Trolley and Railroad Corporation |
| CTRC | Canada Truck Reefer Container Service, LTD. |
| CTRC | Computing Tabulating Recording Company |
| CTRC | Computing-Tabulating-Recording Company |
| CTRDC | Centre for Training, Research and Development Consultancy |
| CTRE | Connecticut Real Estate |
| CTRG | Cancer Therapeutics Research Group |
| CTRG | Cendant Timeshare Resort Group |
| CTRG | Creative Team Resources Group |
| CTRI | Cathodic Tape Recorders, International |
| CTRM | Composites Technology Research Malaysia |
| CTRS | Clinical Trials Research Services, L.L.C. |
| CTRS | Commute Trip Reduction Services |
| CTRU | Cape Town Routes Unlimited |
| CTRW | Computer The Right Way |
| CTRX | Centrex Technologies |
| CTS | Carmichael Training Systems |
| CTS | Chicago Telephone Service |
| CTS | Chicago Telephone Supply |