Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym USMP-4 is...

USMP-4 is

  • United States Micro-gravity Payload-4

USMP-4 is also in:

Acronym Definition Searched: SL NSD IINT REG SOL WSSXA CCRA EPM 26173 MPS STS HRR GPSS CGC 95002