| item | description | category | filter | more on... |
| OAA | Office of Academic Affairs | Edu./Universities |
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| OAA | Ogden, Allen, and Associates | Business/Firms |
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| OAA | Ontario Association Of Archers | Radio Stations |
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| OAA | Open Agent Architecture | IT/General |
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| OAA | Orbiter Access Arm | Governmental/NASA |
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| OAA | Orbiter Alternate Airfield | Governmental/NASA |
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| OAA | Oriental Astronomical Association | Business/Prof. Org. |
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| OAA | OxAloAcetate | Edu./Chemistry |
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