| CTSA | Canadian Table Soccer Association 
| Others |
| CTSA | Catholic Television of San Antonio
| Others |
| CTSA | Catholic Theological Society of America
| Others |
| CTSA | Center for the Treatment and Study of Anxiety
| Others |
| CTSA | Center For Tropical And Subtropical Aquaculture
| Others |
| CTSA | Central Texas Silueta Association
| Others |
| CTSA | Central Texas Surgical Associates
| Others |
| CTSA | Centres for temporary stay and assistance
| Others |
| CTSA | Channel Tunnel Safety Authority
| Others |
| CTSA | Chisholm Trail Soccer Association
| Others |
| CTSA | Claire Trevor School of the Arts
| Others |
| CTSA | Clinical and Translational Science Award
| Others |
| CTSA | Clinical and Translational Science Award (grants)
| Others |
| CTSA | Clinical and Translational Science Awards
| Others |
| CTSA | Clinical Translational Science Award
| Others |
| CTSA | Clinical Translational Science Awards
| Others |
| CTSA | Communications Technician Seaman Apprentice
| Others |
| CTSA | Consolidated Transportation Service Agency
| Others |
| CTSA | Continental Tire South Africa
| Others |
| CTSA | Coordinated Transportation Service Agency
| Others |
| CTSA | Cryptologic (technician) Seaman Apprentice
| Others |