The meaning of the Acronym OA is...

OA is

• Operations Agreement
• Overall
• Output Axis
• Orbital Assembly
• Operational Instrumentation MDM-Aft
• Operational Aft (DSC or MOM)
• Office of Applications (now OSTA)

More Meanings For OA:

• Object Address
• Ole Automation
• Open Apple
• Open Appserver
• Open Access
• Org.Apache
• Object Adapter
• Online Adventures
• Organic Acid
• Orthogonal Array
• Office of Administration
• Overzealous Academy
• Outreach and Admissions
• Open Agility
• Order of Alequi

OA is also in:

• Assembly
• Chat
• Dogs Related
• Electronics
• General
• Mathematics
• Networking
• Ocean Science
• Science Fiction
• Software
• Universities