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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&E - Architectural and Engineering
A&E - Architects and Engineering
A&I - Assembly and Installation
A&L - Approach and Landing
A&P - Attitude and Pointing
A&PS - Administration and Program Support
MSFC Directorate
A&R - Automation and Robotics
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