TR2 means Payload Furnished Mars Tape Recorder 2 of 2 in NASA
Similar to TR2
ACCMS - Advanced Checkout, Control, and Maintenance SystemACCS - Advanced Checkout and Control System
ACE - Advanced Composition Explorer
ACE - Apollo Checkout Equipment
ACES - Acoustic Containerless Experiment System
ACF - Auto- Correlation Function
ACFS - Advanced Concepts Flight Simulator
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