TDD

TDD may refer to:

Science and technology[edit]

Telecommunications device for the deaf, a device for text communication along a telephone line
Test-driven development, a type of software development methodology
Time-division duplex, the application of time-division multiplexing to separate outward and return signals
LTE-TDD, a 4G telecommunications technology and standard
Transdermal drug delivery, a method of delivering drugs through the skin and into the bloodstream

Other uses[edit]

Transportation development district, a special-purpose district created in some US states
Teniente Jorge Henrich Arauz Airport (IATA airport code), Trinidad, Bolivia
Tai Nüa language (ISO639-3 code: tdd)

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