FES/VCGS means Fluid Experiment System/Vapor Crystal Growth System in NASA
Similar to FES/VCGS
AC - Assembly CompleteACBM - 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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