Orbiter Access Arm
Open Agent Architecture
Office of the Assistant Administrator
Old Age Assistance
Older Americans Act
Orbiter Alternate Airfield
office administrative assistant
Office of Academic Affairs
Open Avionics Architecture
Opticians Association of America
Observatorio Astronómica de Argentina
Obstetric Anaesthetists' Association
Office of Academic Affiliations
Office of Assessment & Accountability
oleic acid anilide
On Air Activation
Ontario Association of Architects
Ontario Automobiel Association
Open Arcade Architecture
Operational Assessment Analysis
opportunity-available action
Orient Airlines Association
Oriental Astronomical Association
Outdoor Advertising Association
Over Air Addressing
Owners Association Alliance
Oxalacetate
oxalacetic acid
Oxalic Acid Anodizing
oxaloacetate
oxaloacetic acid
Oxley Aviation
Ozark Adventist Academy
Observer's Assessment of Alertness
Ontario Automobile Association
Operational Airworthiness Authority
Ordem dos Advogados de Angola
Organization for the Advancement of the Arts
Organization of Active Adults
ORU Alternative Analysis