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Technical Standards Order
in NASA
Time Sharing Option
in NASA
Time Since Overhaul
in NASA
132600132602132601
Similar to TSO
AC - Assembly Complete
ACBM - Active Common Berthing Mechanism
ACC - Aft Cargo Carrier
ACCA - Automatic Cloud Cover Assessment
ACCMS - Advanced Checkout, Control, and Maintenance System
ACCS - Advanced Checkout and Control System
ACE - Advanced Composition Explorer
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