| Acronym | Definition |
|---|
| ASO | Address Supporting Organization |
| ASO | Atlanta Symphony Orchestra |
| ASO | And So On |
| ASO | Administrative Services Only |
| ASO | Amaury Sport Organisation (France) |
| ASO | Administrative Services Organization |
| ASO | Algemeen Secundair Onderwijs (Dutch) |
| ASO | Alabama Symphony Orchestra |
| ASO | Anti-streptolysin O |
| ASO | AIDS Service Organization |
| ASO | Adelaide Symphony Orchestra |
| ASO | Advanced Security Option (Oracle) |
| ASO | Automatic Shut Off |
| ASO | Association for the Study of Obesity |
| ASO | Arteriosclerosis Obliterans |
| ASO | Albany Symphony Orchestra (Albany, NY, USA) |
| ASO | Arkansas Symphony Orchestra |
| ASO | After School Online |
| ASO | Allele-Specific Oligonucleotides |
| ASO | Australian Society of Orthodontists |
| ASO | Aviation Supply Office (Navy) |
| ASO | Aviation Supply Office(r) |
| ASO | Alton Symphony Orchestra (Godfrey, IL) |
| ASO | Analog Switch-Off (TV) |
| ASO | Arbitrary Slice Ordering |
| ASO | Automated Systems Operations |
| ASO | Ankara Sanayi Odasi |
| ASO | air support operations (US DoD) |
| ASO | Analog Shut Off |
| ASO | Australian Space Office |
| ASO | Asheville Symphony Orchestra (North Carolina) |
| ASO | Anderson Symphony Orchestra (Anderson, Indiana) |
| ASO | Astronomical Search for Origins |
| ASO | Academic Services Office |
| ASO | Aurora Symphony Orchestra (Aurora, CO) |
| ASO | Advanced Solar Observatory |
| ASO | Air Surveillance Officer |
| ASO | Acoustic Sensor Operator (ASW Helicopters) |
| ASO | Astronomía Sigma Octante |
| ASO | Assistant Scientific Officer |
| ASO | Automatic Stop Order (medication) |
| ASO | Additional Settlement Obligation |
| ASO | Arteriosclerotic Obliterans |
| ASO | Académie des Sciences Occultes (French: Academy of Occult Sciences) |
| ASO | Antisense Oligomer |
| ASO | Assistant Supply Officer (Royal Australian Navy) |
| ASO | Army Safety Office |
| ASO | As Subrogee Of (legal designation) |
| ASO | Area Security Operations |
| ASO | American Society of Osseointegration |
| ASO | Acquisition Support Organization |
| ASO | Association Sportive d'Ollainville (French: Ollainville Sports Association; Ollainville, France) |
| ASO | Area Supply Officer |
| ASO | Apparent Successful Offeror |
| ASO | Atomic Spin Orbital |
| ASO | Automatic Safety Override (locomotive control system) |
| ASO | American Standards Organization |
| ASO | Academic Sector Operations |
| ASO | Assistant Secretary's Office |
| ASO | American Society for Oceanography |
| ASO | Approximate Simultaneous Orthogonal |
| ASO | Administration Support Office |
| ASO | Assault Supply Officer |
| ASO | Ammunition Supply Officer |
| ASO | Automotive Safety Offices (Ford) |
| ASO | Automatic Send Only |
| ASO | America Support Organization |
| ASO | Annual Service Order |
| ASO | Additional Services Offering |
| ASO | Authorized Signing Officer |
| ASO | Acting Station Officer |
| ASO | Alternate Service Office |
| ASO | Afghanistan Solidarity Organisation |
| ASO | Ambler Symphony Orchestra (Ambler, PA) |
| ASO | Ankle Stabilizing Orthosis (support brace; various companies) |
| ASO | August Symphony Orchestra (Bloomfield, NJ) |
| ASO | Account Security Officer (various companies) |
| ASO | All State Orchestra (Colorado) |