| Acronym | Definition |
|---|
| CTRF➣Canadian Transportation Research Forum |
| CTRF➣Cancer Treatment Research Foundation (now Gateway for Cancer Research) |
| CTRF➣Christian Theological Research Fellowship |
| CTRF➣Connecticut Renaissance Festival (Woodstock, Connecticut) |
| CTRF➣Census Tract Relationship Files (Inter-University Consortium for Political and Social Research) |
| CTRF➣Celestial and Terrestrial Reference Frames |