| Acronym | Definition |
|---|
| CTSD➣Clinical Trials Signal Detection (clinical research) |
| CTSD➣Countdown to Signing Day (sports) |
| CTSD➣Crew and Thermal Systems Division |
| CTSD➣Churches Together in Spalding and District (UK) |
| CTSD➣Certified Trading System Developer |
| CTSD➣Computer Test Sequences Document (NASA) |
| CTSD➣Coordinate Transformation System (NASA) |
| CTSD➣Combat Training Support Directorate |
| CTSD➣Chiyoda Toyo Sakhalin Development |
| CTSD➣Certified Technology Specialist - Design (International Communications Industries Association certification) |