TDT

TDT may refer to:

• Digital terrestrial television
  • TDT (TV station), a digital television station in Tasmania, Australia
  • TDT (Portugal), digital terrestrial television in Portugal
  • TDT (Spain), digital terrestrial television in Spain
• TDT Band (The Down Troddence), a six piece Indian thrash metal band
• TDT Banda or Thamar Dillon Thomas Banda (fl. 1957–1962), Nyasaland politician
• Terminal deoxynucleotidyl transferase, a specialized DNA polymerase expressed in immune cells
• Terrestrial Dynamical Time, an obsolete name for Terrestrial Time
• The Damned Things, an American heavy metal supergroup
• Time domain transmissometry, a method of testing transmission lines
• Toronto Dance Theatre, a Canadian modern dance company based in Toronto, Ontario
• Tracing Debugging Technique, an early debugger by DEC
• Transmission disequilibrium test, a family-based genetic association test
• The Dark Tower (series), a book series written by Stephen King.