Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym USMM is...

USMM is

  • United States Merchant Marine

More Meanings For USMM:

  • United States Merchant Marine
  • United States Military Mart
  • United States Merchant Marine
  • United States Merchant Marine

USMM is also in:

Acronym Definition Searched: CHKP E CMV 48505 SDV RIA HIP CENMA HREX HW OFX 28454 BARS (CDER) UVF FEAP