| Acronym | Definition |
|---|
| RAO➣Radio Receiver (US Navy) |
| RAO➣Regulated Activities Order |
| RAO➣Rechtsanwaltsordnung (German: Lawyers' Act; Austria) |
| RAO➣Right Anterior Oblique (Radiologic Term) |
| RAO➣Recurrent Airway Obstruction |
| RAO➣Retiree Activities Office |
| RAO➣Research and Advocacy Organization |
| RAO➣Retinal Artery Occlusion |
| RAO➣Response Action Outcome (Massachusetts and New Jersey) |
| RAO➣Recent African Origin (paleoanthropology) |
| RAO➣Réponse À Appel d'Offres (French: Tender Response) |
| RAO➣Research Administration Officer (Australia) |
| RAO➣Race across Oregon (bicycling) |
| RAO➣Russian Archives Online |
| RAO➣Ribeirao Preto, Sao Paulo, Brazil (Airport Code) |
| RAO➣Research Analysis Office |
| RAO➣Remedial Action Objective |
| RAO➣Response Amplitude Operator (mechanical engineering) |
| RAO➣Royal Army of Oman |
| RAO➣Regional Accounting Office |
| RAO➣Registration Authority Operator |
| RAO➣Recherche Assistée par Ordinateur (French: Computer Assisted Research) |
| RAO➣Rassemblement des Astrologues Occidentaux (French: Gathering of Western Astrologers) |
| RAO➣Regional Aviation Officer (US Forest Service position) |
| RAO➣Resident Arts Organization (various locations) |
| RAO➣ReadAllOver (image file format) |
| RAO➣Resource Analysis Office |
| RAO➣Read As One |
| RAO➣Réflexion Assistée par Ordinateur (French: Computer Assisted Puzzle) |
| RAO➣Rhône Alpes Orchidées (French: Rhone Alps Orchids; est. 1987) |
| RAO➣Right Ascension Offset |
| RAO➣Regimental Administration Office (BATUS) |
| RAO➣Regimental Activities Officer |
| RAO➣Residential Actions Office (US military) |
| RAO➣Resident Agent Office |
| RAO➣Rating Assignment Office (US Navy) |
| RAO➣Rhône Alpes Outillage (French: Rhone Alps Tools) |