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Operator Proficiency Training Board
in NASA
Operational Program Time Base
in NASA
128264128265
Similar to OPTB
ABCL - As Built Configuration List
ABE - Anomalous Biological Entities
ABHRS - As Built Hardware Reporting System
ABL - Allocated BaseLine
ABOLT - Acquire Bolt
ABS - Anti Burn Shield
ABS - After Body Section
View all in NASA