What does TUU stand for?

Compania Aerea de Servicios Tur Air - Spain - ICAO designator (FAAC)

Huntington, WV - Location identifier - FAA (FAAL)

Tabuk - Saudi Arabia - Airport symbol (OAG)

Transitional Ultraspherical-Ultraspherical Filter (PDAA)

Transureteroureterostomy - Medicine (DAVI)

Tututni - Language code (ETLW)