ADT

ADT, as an abbreviation, may refer to:

• Abstract data type, a computer programming term
• Algebraic data type, a term from functional programming
• Active Denial Technology
• Admission, Discharge, and Transfer, a message type used in Health Level 7 formatted communication
• Alternating decision tree, another term in computer programming
• American Death Triangle, a deprecated rock climbing anchor system.
• American Discovery Trail, a coast-to-coast hiking trail across the mid-tier of the United States
• Androgen deprivation therapy, a common component of treatment for prostate cancer
• Android Development Tools
• Asynchronous data transfer, a method of transferring data
• Atlantic Daylight Time
• Automatic double tracking, an audio recording technology invented for The Beatles
• Average Daily Traffic, to show the volume of traffic on a road in transportation planning
• Average downtime, a simple quantification of a system's reliability

ADT may also refer to:

• The ADT Corporation, formerly American District Telegraph
• ADT College, a City Technology College in London