AOTA = Airfields On The Air

BOTA = Beaches On The air

CASHOTA = Castles And Stately Homes On The Air
seems like just COTA would be a better fit in this group

GOTA = Get On The Air (in conjunction with Field Day)

IOTA = Islands On The Air

JOTA = Jamboree On The Air (a Scouting event)

LOTA = Lighthouses On The Air

POTA = Parks On The Air (defunct as far as I can tell)
currently for 2016, NPOTA (ARRL sponsored)

SOTA = Summits On The Air

YOTA = Youngsters On The Air

POTTY = provinces on the teletype.

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