AD (disambiguation)

AD (Anno Domini) is a designation used to label years following 1 BC in the Julian and Gregorian calendars.

Ad (advertisement) is a form of marketing communication.

AD, A.D. or Ad may also refer to:

Film and television

 * A.D. (film), a 2010 animated zombie horror film
 * A.D. (miniseries), a 1985 television miniseries set in ancient Rome
 * A.D. The Bible Continues, a 2015 biblical drama television miniseries
 * Arrested Development, an American television sitcom
 * Attarintiki Daredi, 2013 Indian film by Trivikram Srinivas
 * Audio description, a service for visually impaired audience on some TV programs

Music

 * AD (band), a Christian rock band
 * A.D. (album), by Solace

Publications

 * AD (poem), by Kenneth Fearing
 * A.D.: New Orleans After the Deluge, a nonfiction graphic novel about Hurricane Katrina
 * Algemeen Dagblad, a Dutch newspaper
 * Architectural Digest, an interior design and landscaping magazine

Other art, entertainment, and media

 * Audio description track, a narration track for visually impaired consumers of visual media

Brands and enterprises

 * Alexander Dennis, a British bus manufacturer
 * Akcionersko društvo (aкционерско друштво), a Macedonian name for a type of company
 * Aktsionerno drujestvo (акционерно дружество), a Bulgarian name for a type of company
 * akcionarsko društvo (aкционарско друштво), a Serbian name for a type of company
 * Analog Devices, a semiconductor company

Educational qualifications

 * Artist diploma, a music performance certificate conferred by higher education institutions.

Military

 * Accidental discharge, a mechanical failure of a firearm causing it to fire
 * Active duty, a status of full duty or service, usually in the armed forces
 * Air defense, an anti-aircraft weaponry and systems
 * Air Department, part of the British Admiralty
 * A US Navy hull classification symbol: Destroyer tender (AD)
 * AD Skyraider, former name of the Douglas A-1 Skyraider, a Navy attack aircraft

Organizations

 * Action Directe, a French far-left militant group
 * Democratic Action (Venezuela) (Acción Democrática), a social democratic and center-left political party
 * Democratic Alliance (Portugal, 1979) (Aliança Democrática), a former centre-right political alliance
 * Democratic Alternative (Malta) (Alternattiva Demokratika), a green political party

People

 * Ad (name), a given name, and a list of people with the name
 * ‘Ad, great-grandson of Shem, son of Noah
 * Anthony Davis (born 1993), American basketball player
 * A. D. Loganathan (1888–1949), officer of the Indian National Army
 * A. D. Whitfield (born 1943), American football player
 * A. D. Winans (born 1936), American poet, essayist, short story writer and publisher
 * A.D., nickname of Adrian Peterson (born 1985), American football player

Places

 * AD, ISO 3166-1 country for Andorra
 * Abu Dhabi, capital of the United Arab Emirates
 * AD, herbarium code for the State Herbarium of South Australia
 * Andhra Pradesh, a state in southern India (HASC code)

Professions

 * Art director, for a magazine or newspaper
 * Assistant director, a film or television crew member
 * Athletic director, the administrator of an athletics program

Biology and medicine

 * Addison's disease, an endocrine disorder
 * Adenovirus, viruses of the family Adenoviridae
 * Alzheimer's disease, a neurodegenerative disease
 * Anaerobic digestion, processes by which microorganisms break down biodegradable material
 * Anti-diarrheal, medication which provides symptomatic relief for diarrhea
 * Approximate digestibility, an index measure of the digestibility of animal feed
 * Atopic dermatitis, form of skin inflammation
 * Atypical depression, a type of depression
 * Autosomal dominant, a classification of genetic traits
 * Autonomic dysreflexia, a potential medical emergency

Chemistry

 * Adamantyl, abbreviated "Ad" in organic chemistry
 * Sharpless asymmetric dihydroxylation, a type of organic chemical reaction

Computing

 * .ad, the top level domain for Andorra
 * Administrative distance, a metric in routing
 * Active Directory, software for the management of Microsoft Windows domains
 * Administrative domain, a computer networking facility
 * Analog-to-digital converter, a type of electronic circuit
 * Automatic differentiation, a set of computer programming techniques to speedily compute derivatives
 * AD16, the hexadecimal number equal to decimal number 173

Mathematics

 * Adjoint representation of a Lie group, abbreviated "Ad" in mathematics
 * Axiom of determinacy, a set theory axiom

Physics

 * Antiproton Decelerator, a device at the CERN physics laboratory
 * Autodynamics, a physics theory

Other uses in science and technology

 * Active disassembly, a technology supporting the cost-effective deconstruction of complex materials

Transportation

 * AD, IATA code for:
 * Air Paradise, a defunct Indonesian airline
 * Azul Brazilian Airlines
 * Airworthiness Directive, an aircraft maintenance requirement notice

Other uses

 * ʿĀd, an ancient Arab tribe, mentioned in the Quran
 * Aggregate demand, in macroeconomics
 * Anno Diocletiani, an alternative year numbering system
 * United States Academic Decathlon, a high school academic competition