AR, Ar, or A&R may refer to:
An arthropod (, from Greek ἄρθρον arthron, "joint" and πούς pous, "foot") is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and paired jointed appendages.
Argentina (Spanish: [aɾxenˈtina]), officially named the Argentine Republic (Spanish: República Argentina), is a country located mostly in the southern half of South America.
Ariana Grande-Butera (; born June 26, 1993) is an American singer, songwriter, and actress. Born of Italian heritage in Florida, she began her career in 2008 in the Broadway musical 13, before playing the role of Cat Valentine in the Nickelodeon television series Victorious (2010–2013) and in the spinoff Sam & Cat (2013–2014).
Arnold Alois Schwarzenegger (; German: [ˈaɐ̯nɔlt ˈʃvaɐ̯tsn̩ˌʔɛɡɐ]; born July 30, 1947) is an Austrian-American actor, filmmaker, businessman, investor, author, philanthropist, activist, politician, and former professional bodybuilder and powerlifter.
Arabic (Arabic: العَرَبِيَّة) al-ʻarabiyyah [alʕaraˈbijːa] (listen) or (Arabic: عَرَبِيّ) ʻarabī [ˈʕarabiː] (listen) or Arabic pronunciation: [ʕaraˈbij]) is a Central Semitic language that first emerged in Iron Age northwestern Arabia and is now the lingua franca of the Arab world.
Artificial intelligence (AI), sometimes called machine intelligence, is intelligence demonstrated by machines, in contrast to the natural intelligence displayed by humans and other animals.
Artemis Fowl is a series of eight science fiction fantasy novels written by Irish author Eoin Colfer, featuring the criminal mastermind Artemis Fowl II.
Arizona ( (listen); Navajo: Hoozdo Hahoodzo Navajo pronunciation: [xòːztò xɑ̀xòːtsò]; O'odham: Alĭ ṣonak Uto-Aztecan pronunciation: [ˡaɺi ˡʂonak]) is a U.S.