| Abbreviation | Definition |
|---|---|
| ActaMedScandSuppl | Acta Medica Scandinavica Supplementum (Stockholm) |
| ActaPharmaceutJugo | Acta Pharmaceutica Jugoslavica |
| ActaPharmacolToxicol | Acta Pharmacologica et Toxicologica (Copenhagen) |
| ActaPhysiolScand | Acta Physiologica Scandinavica (Oxford) |
| ACUA | Archives of the Catholic University of America |
| ADAL | Active Directory Authentication Library |
| ADBL | Albany Downtown Branch Library |
| ADDD | Archive, Document, Display, and Disseminate |
| AdeF | Archives de France |
| AderHandBiolArbeitsmethod | Abdernalden's Handbuch der Biologischen Arbeitsmethoden |
| ADFJ | Australian Defence Force Journal |
| adj. | adjective |
| ADL | AHEC Digital Library |
| ADL | AMD Display Library |
| ADML | Alliance Digital Medial Library |
| ADTL | Army Digital Training Library |
| adv. | adverb |
| AE | American Edition |
| AE | Archival Edition |
| AEG | All Edges Gilt |