ADT or Adt may refer to:
Aviation Air Departure Tax, in Scotland Ada Municipal Airport in Oklahoma, US (IATA airport code ADT)
Organizations and enterprises Abu Dhabi Terminals, abbreviated ADT, port operator for all commercial ports in Abu Dhabi Adirondack Trailways, an American bus company ADT College, in London ADT Inc., formerly American District Telegraph, which provides residential and small business electronic security and similar services in many countries
People Ana de Teresa (born 2001), Spanish footballer known as ADT Harro Adt (born 1942), German diplomat Katrin Adt (born 1972), German business executive
Places American Discovery Trail, a system of recreational trails in the US
Science and technology Biology and medicine Androgen deprivation therapy, a common component of treatment for prostate cancer Arogenate dehydratase, an enzyme Azadithiolate cofactor, an organosulfur compound found in some enzymes
Computing Abstract data type Algebraic data type, a composite type in computer programming Alternating decision tree, a machine learning method Android Development Tools, a plugin for the Eclipse IDE Asynchronous data transfer
Technology Active Denial Technology, a non-lethal, directed-energy weapon developed by the U.S. military Admission, discharge, and transfer system, a system for the structure of other types of business systems Automatic double tracking, an audio recording technology
Sports Asian Development Tour, a golf tour Asociación Deportiva Tarma, a Peruvian association football club Azkals Development Team, a Filipino football club
Other uses Adnyamathanha language, an Australian Aboriginal language (ISO 639-3 code "adt") American death triangle, a deprecated rock climbing anchor system Atlantic Daylight Time Average Daily Theoretical (also known as "theoretical loss" or "theo"), a calculation used to determine gamblers' casino comps Average Daily Traffic, used in transportation planning Advanced Dvorak Technique, a technique developed on the basis of the Dvorak technique to estimate the intensity of tropical cyclones