PDT may refer to:


  • PHP Development Tools, an IDE plugin for the Eclipse platform
  • Portable data terminal, an electronic device that is used to enter or retrieve data via wireless transmission


  • Patient-delivered therapy
  • Photodynamic therapy, treatment for cancer and wet age-related macular degeneration, involving three key components, a photosensitizer, light, and tissue oxygen
  • Population doubling time, a number indicating cell growth in cell cultures
  • Pancreaticoduodenal transplantation


  • Pacific Daylight Time (UTC-7), daylight saving time in western North America
  • Paramount Domestic Television, US TV series distributor, now CBS Television Distribution
  • Partido Democrático Trabalhista (Democratic Labour Party), a populist, social-democratic political party of Brazil
  • Phi Delta Theta, an international fraternity
  • Piedmont Airlines (ICAO airline code), an American regional airline operating for US Airways Express
  • Plautdietsch (ISO 639-3 language code), a Low Prussian variety of East Low German, with Dutch influence
  • Potentially Dangerous Taxpayer, an American taxpayer that has demonstrated a capacity for violence against the IRS
  • Prague Dependency Treebank, a subset of the Czech National Corpus annotated along the lines of Functional Generative Description
  • Eastern Oregon Regional Airport (IATA airport code), near Pendleton, Oregon
  • Pattern day trader (also Pattern day trading, PDT violation), a stock trader who frequently buys and sells a security within the same trading day
  • Peter Dengate Thrush, New Zealand barrister