ADD
ADD or
Add may be:
*
Addition*
Administration on Developmental Disabilities, part of
United States Department of Health and Human Services* Advanced
Dungeons & Dragons*
assembly language computer instruction to add two numbers
*
Attention-deficit hyperactivity disorder*
Attribute driven design* A.D.D. (American Dream Denial), The sixth track on
System of a Down's third
album,
Steal This Album!*
Analog, digital, digital, a three-letter code for a CD that was recorded and mastered in analog, and transferred digitally.
;Transportation
*
Adderley Park railway station (
National Rail code: ADD), in the United Kingdom
*
Bole International Airport (
IATA airport code: ADD), in Addis Ababa, Ethiopia
