CRT
- CRT (genetics)
- CRT Group
- Calreticulin
- Canadian Railway Troops
- Capillary refill
- Cardiac resynchronization therapy
- Cathode ray tube
- Central venous catheter
- Certified Respiratory Therapist
- Changchun Rail Transit
- Charitable trust
- Chemoradiotherapy
- Chicago Rapid Transit Company
- Chinese remainder theorem
- Chongqing Rail Transit
- Civil Resolution Tribunal
- Claiming Rule Teams
- Cognitive Retention Therapy
- Cognitive reflection test
- Colchester Rapid Transit
- Columbia River Treaty
- Connecticut Repertory Theatre
- Connecticut River Transit
- Corneal Refractive Therapy
- Correctional Emergency Response Team
- Crater (constellation)
- Critical race theory
- Cross River Tram
- Culturally relevant teaching
- Current reality tree (theory of constraints)
- Iyojwaʼja Chorote
- SecureCRT
- Tochigi Broadcasting
- Windows library files
- X.509