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MS Symptoms Early

Acronym: LDEF

Category: NASA Acronyms

Meaning / Stands for:

	Acronym	Meaning
	MVS	Middle Value Select
	TTA	Time To Apogee
	EM	Exception Monitor
	SCOS	Subsystem Computer Operating System
	WSTF	White Sands Test Facility
	TO	Takeoff
	BY	Budget Year
	IGN	Ignition
	PVA	Propellant Valve Actuator
	OD	Oxygen Drain