YVVI means Directorate of Launch Base Operations, Inertial Upper Stage Division in NASA
Similar to YVVI
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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