Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym 77S is...

77S is

  • Hobby Field Airport, Creswell, Oregon USA

77S is also in:

Acronym Definition Searched: CSCW 17402 RGA 28134 CJC LIO CHI 49730 GI PDL TTC TLO GSFC GSF 17521