ASD can refer to:

Biology and medicine

• Acute stress disorder, a psychiatric disorder
• Atrial septal defect, a medical condition affecting the heart
• Autism spectrum disorder, a brain development disorder

Acute stress reaction is a psychological condition arising in response to a terrifying event. ... Atrial septal defects (ASD) are a group of congenital heart diseases that enables communication between atria of the heart and may involve the interatrial septum. ... A boy with autism and his mother Autism refers to a spectrum of disorders, and lies somewhere under the umbrella of a greater encompassing spectrum, that of pervasive developmental disorders that involve the functioning of the brain. ...

Computing, engineering, technology, and transport

• Accredited Symbian Developer, a qualification for developers of software for Symbian OS
• Adaptive Software Development, a software development process
• Adjustable-speed drive used to control electrical engine's speed
• Aigle - Sepey - Diablerets, a Swiss mountain railway
• Allowable stress design, a structural design methodology
• Andromeda Software Development, a Greek demogroup
• ASDF (sequence of letters), the leftmost home row keys on a QWERTY keyboard
• Azimuthing stern drive, a drive/direction system for state of the art "tractor" tugboats

Accredited Symbian Developer (ASD) is an accreditation program for software developers using Symbian OS, a mobile phone operating system. ... Adaptive Software Development is a software development process that grew out of rapid application development work by Jim Highsmith and Sam Bayer. ... Adjustable speed drive (ASD) is one of the most general terms applied to equipment used to control the speed of machinery. ... Railways came to the Chablais area of Vaud and Valais in 1857 when the Lausanne - Simplon railway opened its line through Aigle. ... Permissible stress design (in American construction more commonly called allowable stress design) is a design philosophy used by civil engineers. ... Andromeda Software Development (or simply ASD) is a Greek demogroup that was formed in 1992. ... asdf is the sequence of letters that appear on the first four keys on the home row of a QWERTY or QWERTZ keyboard. ... Siemens Schottel azimuth thrusters An Azimuth thruster is a configuration of ship propellers placed in pods that can be rotated in any horizontal direction. ...

Literature

• A Scanner Darkly, a 1977 novel by Philip K. Dick

A Scanner Darkly is a 1977 science fiction novel by Philip K. Dick. ...

Social sciences and society

• After school detention, detention held after school
• American School for the Deaf in Hartford, Connecticut
• American School of Dubai, an educational institute located in Dubai, United Arab Emirates
• American Standard Companies, a global provider of air conditioning systems
• Anchorage School District, the district of schools in Anchorage, Alaska

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