| Acronym | Definition |
|---|
| CTSI➣Clinical and Translational Sciences Institute (various locations) |
| CTSI➣Corbett Technology Solutions, Inc. (Chantilly, VA) |
| CTSI➣Census Tract Street Index (US Census Bureau) |
| CTSI➣California Traffic Safety Institute |
| CTSI➣Carlson's Trophic State Index (US EPA) |
| CTSI➣Child Traumatic Stress Initiative (US DHHS) |
| CTSI➣Central Terminal Signaling Interface |