>>3
ASD may refer to:
Biology and medicine
* Acute stress disorder, a psychiatric disorder
* Autism spectrum disorders
* Antiseizure drug
* Aspartate-semialdehyde dehydrogenase
* Asd RNA motif
* Atrial septal defect
Computing, engineering, technology, and transport
* Accredited Symbian Developer, a qualification for developers of software for Symbian OS
* Adaptive Software Development, a software development process
* Allowable stress design, a structural design methodology
* Andromeda Software Development, a Greek demogroup
* Azimuth stern drive (cf. azimuth tractor drive), a drive/direction system for state of the art tugboats
* QWERTY keyboard home row, which begins with ASD
Education
* Academy for Science and Design, a charter school in Merrimack, New Hampshire
* American School for the Deaf in Hartford, Connecticut
* American School of Doha, the largest private high school in Qatar
* American School of Dubai, an educational institute located in Dubai, United Arab Emirates
* Anchorage School District, the district of schools in Anchorage, Alaska
* Armstrong School District (Pennsylvania), the district of schools in Armstrong County, Pennsylvania
* After school detention
Music
* A Skylit Drive, a six-piece, post-hardcore band
* Another Single Day, an American rock band
Film and literature
* A Scanner Darkly, a 1977 novel by Philip K. Dick
* A Scanner Darkly (film), the 2006 film based on the book, and directed by Richard Linklater