Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym 12S is...

12S is

  • Monument Municipal Airport, Monument, Oregon USA

12S is also in:

Acronym Definition Searched: OMOD WSVG FART ML CRS 28574 KP ESFS CITC LSR 67455 C3IEW MRA MFG SRF