IEEE-APS means Institute of Electrical and Electronics Engineers - Antennas and Propagation Society in
NASA
Similar to IEEE-APS
AA - Astronomical Applications
AA - Adverse Action
AA - Antenna Assembly
AAA - Avionics Air Assembly
AAC - Aft Access Closure
AACB - Aeronautics and Astronautics Coordinating Board
AAD - Attitude Anomaly Detector
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