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

12I is

  • Brookville Reservoir Seaplane Base, Brookville, Indiana USA

12I is also in:

Acronym Definition Searched: OASIS SII FSF MGB 4WP 97736 USAFA RCMP RST OI TW SLOT 15902 CBT PHA