CRTT
| Acronym | Definition |
|---|---|
| CRTT | Certified Respiratory Therapy Technician (now Certified Respiratory Therapist) |
| CRTT | Croesor Rhosydd through Trip (mine exploration; UK) |
| CRTT | Computational-Representational Theory of Thought (philosophy) |
| CRTT | Chautauqua Rails-to-Trails (Mayville, NY) |
| CRTT | Choice Reaction Time Test |
| CRTT | Computer Resources Technology Transition |
| CRTT | Chalk River Technicians and Technologists Independent Union (Canada) |