| Commercial Truck Load | Transportation | CTL |
| Cytotoxic T-Lymphocyte | Laboratory | CTL |
| Computational Tree Logic | Information Technology | CTL |
| core transistor logic | Government | CTL |
| Crossways Trust Limited | Organization | CTL |
| Control file (dBASE IV - Aldus Setup) | File Extension | CTL |
| Charleville, Queensland, Australia | Regional Airport Code | CTL |
| checkout test language | Government | CTL |
| Complementary Transistor Logic | Electronics | CTL |
| Complex Test Layout | Computing | CTL |
| CenturyTel, Inc. | NYSE Symbol | CTL |
| Cervical, thoracic, lumbar | Physiology | CTL |
| Clarendon Trust Limited | Organization | CTL |
| Combination To Locker | University | CTL |
| CenturyLink, Inc. | NASDAQ Symbol | CTL |
| Coal To Liquids | Chemistry | CTL |
| Charleville airport | Regional Airport Code | CTL |
| Computer Technology Link | Technology | CTL |
| construction technical letter | Government | CTL |
| Catalyst Paper Corporation | Toronto Stock Exchange | CTL |
| Center for Teaching and Learning | University | CTL |
| Candidate Target List | Military and Defence | CTL |
| Complex Text Layout | Other | CTL |
| Charleville | Airport Code | CTL |
| Control | Space Science | CTL |
| Critical Task List | Military | CTL |
| Canoga Test Laboratory | Space Science | CTL |
| component team leader | Government | CTL |
| CHITAL | Indian Railway Station | CTL |
