WD in NASA could mean:
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Similar to WD
AACB - Aeronautics and Astronautics Coordinating BoardAAD - Attitude Anomaly Detector
AAFE - AeroAssist Flight Experiment
AAFM - Acoustic Atomic Force Microscopy
AAR - After Action Review
AARL - Aeronautical and Astronautical Research Laboratory
AAV - Air Admittance Valve
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