Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym 61S is...

61S is

  • Cottage Grove State Airport, Cottage Grove, Oregon USA

61S is also in:

Acronym Definition Searched: TNE FI 60433 UA 1N9 08730 49078 RIC CASE GEOS FBT DOS NIPS DFF TWNA