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Orbiter Project Schedule
in NASA
OPerational Sequence
in NASA
Oxygen Purge System
in NASA
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Similar to OPS
A&PS - Administration and Program Support
MSFC Directorate
A&R - Automation and Robotics
A&RC - Application and Resource Control
A&TA - Assembly and Test Area
A&V - Assembly and Verification
A/A - Air to Air
A/C - Aircraft
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