| Acronym | Definition |
|---|
| ARMA➣Association of Records Managers & Administrators (formerly American Records Management Association) |
| ARMA➣Armed Assault (military simulation game) |
| ARMA➣Association for Renaissance Martial Arts (formerly Historical Armed Combat Association) |
| ARMA➣Autoregressive Moving Average |
| ARMA➣American Rock Mechanics Association |
| ARMA➣Asphalt Roofing Manufacturers Association (Rockville, Maryland) |
| ARMA➣Association of Residential Managing Agents (trade association; UK) |
| ARMA➣Auto Regressive Moving Average |
| ARMA➣Association of Research Managers and Administrators (UK) |
| ARMA➣American Records Management Association (now Association of Records Managers & Administrators) |
| ARMA➣Atlas du Risque de la Malaria en Afrique |
| ARMA➣Audiovisual Rights Management Association (Japan) |
| ARMA➣Adaptability Rating for Military Aviation |
| ARMA➣Annular Ring Microstrip Antenna |
| ARMA➣Association Réunionnaise des Maquettistes Amateurs (French amateur modellers association) |