| Acronym | Definition |
|---|
| ARO➣Automatic Request for Retransmission |
| ARO➣Army Research Office |
| ARO➣ATS (Air Traffic Services) Reporting Office |
| ARO➣After Receipt of Order |
| ARO➣Academic Research Organization |
| ARO➣Asset Retirement Obligation |
| ARO➣Automobilul Romanesc |
| ARO➣Application Resource Optimizer (software development) |
| ARO➣Association for Research in Otolaryngology |
| ARO➣Aromatase |
| ARO➣Alfa Romeo Owners (car club; various locations) |
| ARO➣Agreement on Rules of Origin (United Nations) |
| ARO➣Acquisition Reform (US Navy) |
| ARO➣Application Release Orchestration (Gartner) |
| ARO➣Average Rate Option (finance) |
| ARO➣Atlanta Regional Office (Georgia) |
| ARO➣Air Refueling Operator (US Air Force) |
| ARO➣Annualized Rate of Occurrence |
| ARO➣Antibiotic Resistant Organisms |
| ARO➣Air Traffic Services Reporting Office (Italy) |
| ARO➣Access Request Object |
| ARO➣Acquisition Reform Office |
| ARO➣Agriculture Research Organization |
| ARO➣Action Recovery Online (Montana) |
| ARO➣Autosomal Recessive Osteopetrosis |
| ARO➣Alternate Regulatory Option |
| ARO➣Application Response Option (Computer Associates) |
| ARO➣Association of Regional Observatories (UK) |
| ARO➣Abrasion Resistant Overcoating |
| ARO➣All Rods Out |
| ARO➣Animal Resource Officer |
| ARO➣Airport Reporting Office |
| ARO➣Airport Reservations Office |
| ARO➣Active Resonator Oscillator |
| ARO➣Airborne Reconnaissance Office |
| ARO➣Auxiliary Readout |
| ARO➣Announcement of Research Opportunity (various organizations) |
| ARO➣African Regional Organizations (workshop) |
| ARO➣Altairian Religious Order |
| ARO➣Alquiler Rehabilitacion Operacion (Spanish: Rental Rehabilitation Operation) |
| ARO➣Automatic Reconfiguration Order (space physics) |
| ARO➣Advanced Reactor Operations |
| ARO➣Acquisition Requirements Office |
| ARO➣Adspirant Reserve Officier (Dutch) |
| ARO➣Auxiliary Retail Outlet |
| ARO➣Alternate Retail Outlet (Harley-Davidson) |