| Acronym | Definition |
|---|
| BTLA➣B and T Lymphocyte Attenuator (cells) |
| BTLA➣Board of Tax and Land Appeals (New Hampshire) |
| BTLA➣Boone Tree Library Association (est. 1946; Tennessee and Virginia) |
| BTLA➣Basal Temporal Language Area |
| BTLA➣Belvedere-Tiburon Library Agency (est. 1955; Tiburon, CA) |
| BTLA➣Brooklyn Town Library Association (Brooklyn, CT) |