Acronyms & Abbreviations

The definition of OSA is:

Augustinian Sisters

IATA code for All Airports, Osaka, Japan

IATA code for Mount Pleasant Regional Airport, Mount Pleasant, Texas, United States

Oakland School For the Arts

Object System Adaptor

Objective Switching Architecture

Obstructive Sleep Apnea

Obstructive sleep apnea syndrome

Obstructive sleep apneas

Obstructive sleep apnoea

Obstructive sleep apnoea syndrome

Occlusive sleep apnea syndrome

Offensive Situation Awareness

Office of Safety Appraisals

Office of Safety Assessment

Office of Services to the Aging

Office of Special Activities

Office of Special Applications

Office Of Student Activities

Office of Student Affairs

Office of Systems Analysis

Office of the Science Advisor

Office of the Secretary of the Army

Office of the State Actuary

Office Secret Act

Office Secretary of the Army

Office System Architecture

Office Systems Administrator

Oklahoma Sociological Association

Old Statistical Account

Old Stone Age

Olefin modified styrene acrylonitrile

On-Stream Analysis

Online Sexual Activity

Open Scripting Architecture

Open Service Access

Open Service Architecture

Open Services Access

Open Services Architecture

Open Sky Aviation

Open Society Archives

Open Software Architecture

Open Solutions Architecture

Open Storage Area

Open System Architect

Open System Architecture

Open Systems Adapter

Open Systems Adaptor

Open Systems Approach

Open Systems Architecture

Operating System Administrator

Operating System Augmentation

Operational safety analysis

Operational safety assessment

Operational Support Aircraft

Operational Support Airlift

Operational Support Area

Operational Support Authority

Operations Summary Addendum

Operator System Access

Opponent Slugging Average

Optical Society of America

Optical Spectrum Analysis

Optical Spectrum Analyzer

ORBITAL SUN ANGLE

Order of Saint Augustine

Order of St. Anne

Order of St. Augustine

Ordered subset analysis

Ordered subsets analysis

Ordered-Subset Analysis

Ordinis Sancti Augustini

Organic Soil Association

Organization of Staff Analysts

Osage

Osteosarcoma

Other Sponsored Activities

Otto Schulze Autometer

Out of Service Area

Outer Soundings Array

Outfitting Supply Activity

Outfitting Support Activity

Output Sharing Array

Output Spooling Area

Ovarian sectional area

Overseas Supply Agency

Ovine serum albumin

Oxygen Status Algorithm

SCS Open Service Access-Service Capability Server