sort by Rank | Alpha
| Possible Meanings | Rank |
| Association for Teacher Librarianship in Canada | *** |
| Assistive Technology Law Center | *** |
| Advanced Technology Learning Center | *** |
| adult-type Leydig cells | ** |
| affinity thin-layer chromatography | ** |
| alloreactive T cell clones | ** |
| Alt TOYOTA LandCruiser Club | ** |
| Atomic Trade and Labor Council | * |