| Abbreviation | Definition |
|---|---|
| AQ | Automated Quotations |
| AQR | Alaska Quarterly Review |
| ARAB | Arabian |
| ARC | Advanced Readers Copy |
| ARC | Art Response And Copy |
| ARD | Arbeitsgemeinschaft der Öffentlichrechtlichen Rundfunk anstalten der Bundesrepublik Deutschland |
| ARDP | Agence Réunionnaise de Distribution de la Presse |
| ARF | Advertising Research Foundation |
| ARIA | Automated Response Interactive Audio |
| ARMD | ATAPI Removable Media Device |
| ARMS | All Radio Methodology Study |
| ARRL | American Radio Relay League |
| ARS | Audience Response System |
| ART | American Repertory Theatre |
| ART | Arab Radio and Television |
| ARTS | Artscene Radio Talk Show |
| ARU | Acoustical Resistance Unit |
| ARWA | Alberta Romance Writers Association |
| ASAP | Act Swiftly Awesome Pachyderm (Horton Hears A Who Movie) |
| ASAP | After Some Action Pause |