Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym OSA is...

OSA is

Office of the Secretary of the Army
Operational Support Airlift
Open System Architecture
Office Of Special Affairs
Operational Services Agreement

More Meanings For OSA:

Office Of Student Activities
Office Support Assistant
Oshkosh Student Association
Outdoor Soccer Of America
Office Systems Architecture
Open System Architecture
Open Scripting Architecture
Open Standard Architecture
Open Service Access
Omnibus Service Authority
Office of the Secretary of the Army
Operational Support Airlift
Open System Architecture
Office Of Special Affairs
Operational Services Agreement

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