ADD

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ADD is a three-letter acronym that may refer to:

• Attention deficit disorder, a condition now known as attention-deficit hyperactivity disorder, or ADHD
• Adderley Park railway station, United Kingdom, from its National Rail code
• Administration on Developmental Disabilities, of the United States Administration for Children and Families
• Advanced Dungeons & Dragons
• Ang Dating Daan, a radio-television program in the Philippines
• ADD, an assembly language computer instruction to add two numbers
• Bole International Airport, Addis Ababa, Ethiopia, from its IATA airport code
• Arab Digital Distribution, a pay television network in the Middle East and North Africa
• Architectural Design Document, describes the architectural design using the software requirements and the logical model (defined in the Software Requirements Document - SRD).
• "A.D.D. (American Dream Denial)", a song on System of a Down's album Steal This Album!
• A.D.D. (Audio Day Dream), the first studio album by Blake Lewis, the runner-up on the sixth season of American Idol
• ADD, a SPARS code appearing on some compact disc recordings, telling the consumer that the recording was made on analog (A) equipment and digital (D) equipment was used to mix/edit and master the recording
• ADD2 (Advanced Digital Display 2), a designation for Intel SDVO adapter cards
• Accumulated degree days, calculated by summing average daily temperatures and used to determine the state of temperature dependent processes, usually biological
• ADD model, a hypothesis in physics to explain the weakness of gravity relative to the other forces
• ADD, a slang acronym for Asian Drinking Disorder, referring to the Alcohol flush reaction

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