ADD, or attention deficit disorder, is a former name for attention deficit hyperactivity disorder.

Add or ADD may also refer to:

Entertainment

  • "A.D.D. (American Dream Denial)", a song on the 2002 album Steal This Album! by System of a Down
  • "A.D.D", a song on the 1998 album Hard to Swallow by Vanilla Ice
  • “ADD”, a song on the 2017 album Mix & Match by Loona sub-unit Odd Eye Circle
  • "ADD", a song on the 2022 album Cave World by Viagra Boys
  • A.D.D. (Audio Day Dream), a 2007 album by Blake Lewis

Science and technology

  • Accumulated degree days, a measure of heating or cooling
  • ADD, a SPARS code appearing on some compact disc recordings
  • Addition, a mathematical operation
  • ADD model, a hypothesis in physics
  • Agency for Defense Development, a South Korean national research and development agency
  • Android Developer Day
  • Androsta-1,4-diene-3,17-dione, an intermediate in hormone synthesis
  • Architectural design document (or sometimes Architectural decision document), part of a software design document
  • Automatic dropping device, a safety system for a pantograph

Transport

  • Adderley Park railway station, Birmingham, England
  • Addis Ababa Bole International Airport in Addis Ababa City, Ethiopia

Other uses

  • Associate Deputy Director of the Federal Bureau of Investigation, United States government position
  • Anti-dumping duties; see Dumping (pricing policy)
  • Atatürkist Thought Association (Turkish: ), a Turkish secularism organization
  • Avoid, Deny, Defend, a strategy for responding to active shooters
  • Dzodinka language (ISO 639-3 code), a Niger-Congo language of Cameroon
  • River Add, Scotland

See also

  • Accidental death and dismemberment insurance (AD&D)
  • Advanced Dungeons & Dragons, an edition of the game Dungeons & Dragons