Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym S/A is...

S/A is

Subassembly
Spacecraft Adapter
Site Activation
Scheduled/Actual
Safe and Arm

More Meanings For S/A:

Sensor/Actuator
Subassembly
Spacecraft Adapter
Site Activation
Scheduled/Actual
Safe and Arm

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