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Orbit-to-Orbit Shuttle
in NASA
Orbit-to-Orbit Stage
in NASA
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Similar to OOS
ACE - Advanced Composition Explorer
ACE - Apollo Checkout Equipment
ACES - Acoustic Containerless Experiment System
ACF - Auto- Correlation Function
ACFS - Advanced Concepts Flight Simulator
ACFY - After the Current Fiscal Year
ACIO - Agency Chief Information Officer
View all in NASA