ADD is short for attention deficit disorder, and is an older name for attention deficit hyperactivity disorder. Add or ADD may also refer to: Entertainment A.D.D. (Audio Day Dream), a 2007 album by Blake Lewis "A.D.D", a song on the 1998 album Hard to Swallow by Vanilla Ice "A.D.D. (American Dream Denial)", a song on the 2002 album Steal This Album! by System of a Down “ADD”, a song on the 2017 album Mix & Match by Loona sub-unit Odd Eye Circle Science and technology 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 Accumulated degree days, a measure of heating or cooling Architectural design document (or sometimes Architectural decision document), part of a software design document ADD, a SPARS code appearing on some compact disc recordings Transportation Adderley Park railway station (Station code), Birmingham, England Addis Ababa Bole International Airport (IATA code), Addis Ababa, Ethiopia Other uses River Add, Scotland Anti-dumping duties; see Dumping (pricing policy) Atatürkist Thought Association (Turkish: ), a Turkish secularism organization Dzodinka language (ISO 639-3 code), a Niger-Congo language of Cameroon Agency for Defense Development, a South Korean government agency See also Accidental death and dismemberment insurance (AD&D) Advanced Dungeons & Dragons, an edition of the game Dungeons & Dragons