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Subsystem Operation in Spacelab
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Space Shuttle Orbiter
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Safety Signification Operation
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Source Selection Official
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Support System for OEX
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System Security Officer
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Similar to SSO
ABT - Approximate Burn Time
ABU - Analog Back- Up
ABU - After Body Unit
ABUP - Auxiliary Back- Up Plate
ABV - Above
ABV - Air Bubble Vehicle
AC - Aerodynamic Center
View all in NASA