OSA

Acronym	Definition
OSA	Obstructive Sleep Apnea
OSA	Optical Society of America
OSA	Office of the State Auditor
OSA	Office of Student Affairs
OSA	Office of Special Affairs (Church of Scientology International)
OSA	Office of Substance Abuse
OSA	Optical Spectrum Analyzer
OSA	Outside Air
OSA	Official Secrets Act
OSA	Open Systems Architecture
OSA	Open Society Archives (Budapest, Hungary)
OSA	Overseas Subscribers Agents (lottery agent)
OSA	Office of Student Achievement (various locations)
OSA	Open Service Access (3GPP)
OSA	Operational Support Airlift (US DoD)
OSA	Open Service Architecture
OSA	Organizzazione degli Stati Americani
OSA	Outstanding Service Award
OSA	Office of the Secretary of the Army
OSA	Operational Support Aircraft
OSA	Ordo Sancti Augustini (St Augustine Order)
OSA	Order of Saint Augustine
OSA	Open Software Associates
OSA	Overseas Students' Association (University of Adelaide, Australia)
OSA	Optical Subassemblies (Palomar Technologies)
OSA	Old Stone Age (gaming forums)
OSA	Organization of Staff Analysts (New York, NY)
OSA	Optimal Shelf Availability
OSA	Organización Sionista Argentina
OSA	Opportunistic Spectrum Access
OSA	Oberstabsarzt (German military)
OSA	Om Svar Anhålles
OSA	Order of St Anne
OSA	Oscilloquartz SA (Switzerland)
OSA	Our Special Ale (Anchor Christmas Ale)
OSA	Online Sexual Activity
OSA	Organizations and Strategies in Astronomy
OSA	Object Services Architecture
OSA	Otto Schulze Autometer
OSA	Open Security Architecture (Nortel)
OSA	Orchid Society of Arizona (Phoenix, AZ)
OSA	Ordinis Sancti Augustini (of the order of St Augustine)
OSA	Open Solutions Architecture (Novell)
OSA	Open Space Assessment
OSA	Old Stock Ale (North Coast Brewery)
OSA	Oregon Society of Anesthesiologists
OSA	Opus Sanctorum Angelorum (Latin: Work of the Holy Angels; religious order)
OSA	Oregon Soccer Association (Oregon, WI)
OSA	Office of Space Acquisition
OSA	Office of the Space Architect
OSA	Operational Support Authority
OSA	Olympic Science Alliance
OSA	Out of Station Allowance
OSA	Office Solution Accelerator (Microsoft)
OSA	Olentangy Swim Association (Powell, OH)
OSA	Orbiter-based Station Avionics
OSA	Office of Safety Appraisals
OSA	Outfitting Supply Activity
OSA	Operational Safety Analysis/Assessment
OSA	Objective Switching Architecture
OSA	Operating System Account
OSA	Hermits of St. Augustine, Augustinians (religious order)
OSA	Outfitting Support Activity
OSA	Ocala Sportsman's Association, Inc (Florida, USA)
OSA	Optic Stabilizer Assembly
OSA	OPLAN Supportability Analysis
OSA	observability subspace algorithm
OSA	Ontology Server for Archaeological Information Retrieval and Processing
OSA	On-Screen Analysis
OSA	Owatonna Soccer Association (Minnesota)
OSA	Officially Step Aside
OSA	Organización de Seguros Africanos (Spanish: African Insurance Organization)
OSA	Online Selling Association (Hutchinson, KS)
OSA	Oxford Spires Academy (UK)
OSA	Open Source Academy (various locations)
OSA	Operation Save America (aka Operation Rescue; anti-abortion group)
OSA	Online Savings Account
OSA	Open Solutions Alliance (vendor consortium)
OSA	Oakland School for the Arts (California)