NNI-I means NASA Standard Initiator-Type I
was SMSI in
NASA
Similar to NNI-I
0G - Zero Gravity
2GRLV - 2nd Generation Return to Launch Vehicle
2IC - Second In Command
2M - Micro Miniature
2MASS - Two Micron All-Sky Survey
2STO - Two Stage To Orbit
3-DOF - Three Degree Of Freedom
View all in NASA