TTA may refer to
Tan Tan Airport , Morocco, IATA code
Teacher Training Agency , former name of the Training and Development Agency for Schools, England
Technical Theatre Awards , UK
Terran Trade Authority , the setting for a series of science-fiction books
Tetradecylthioacetic acid , a fatty acid
The Three Amigonauts , a cartoon series
The Tough Alliance , a synthpop duo from Sweden
Thenoyltrifluoroacetone , a chelating agent also commonly known as TTFA
Tibial tuberosity advancement , a knee operation in dogs
Tiny Toon Adventures , an animated television series
Toledo Technology Academy , a public high school in Toledo, Ohio, US
Tomorrowland Transit Authority PeopleMover , in Tomorrowland in Magic Kingdom at Walt Disney World Resort in Orlando, Florida
Total TEU Allowance
Tramway Touristique de l'Aisne , a tourist tramway in Belgium
Transport Ticketing Authority , Victoria, Australia
Transport triggered architecture , computer processor design
Triangle Transit Authority , a regional transit service in North Carolina, US
Tri-State Transit Authority , a transit service in the Huntington, West Virginia, US area
Ṭa (Indic) , the eleventh consonant of Indic abugidas
Transfusion-transmitted anaplasmosis , a human bacterial infection caused by blood transfusion
TTA – Racing Elite League , a Swedish touring car championship
TTA, a codon for the amino acid Leucine
Topics referred to by the same term