| Abbreviation | Definition |
|---|---|
| ARRA | Asphalt Recycling and Reclaiming Association |
| ARRG | Association into Research of Restricted Growth |
| ARRG | Association of Ryerson Roleplayers and Gamers |
| ARRS | Association of Radio Reading Services |
| ARRS | Association of Road Racing Statisticians |
| ARSA | Arizona Rural School Association |
| ARSA | Asia Region Suzuki Association |
| ARSA | Ateneo Resident Students Association |
| ARSAB | Association de Rencontres Spiritualistes Alphonse Bouvier |
| ARSC | Association for Recorded Sound Collections |
| ARSE | Association of Roundels South East |
| ARTA | American Readers Theater association |
| ARTA | American Reusable Textile Association |
| ARTA | American River Touring Association |
| ARTE | Association Relative à la Télévision Européenne |
| ARTP | Association of Railway Training Providers |
| ARTP | Association of Respiratory Technology Physiology |
| ARTS | Association for Retail Technology Standards |
| ARV | Association of Relief Volunteers |
| ARVO | Association For |