NSI-I means NASA Standard Initiator-Type I was SMSI in NASA
Similar to NSI-I
ACE - Advanced Composition ExplorerACE - 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