AR, Ar, or A&R may refer to:
An arthropod (, from Greek ἄρθρον arthron, "joint" and πούς pous, "foot" (gen. ποδός)) is an invertebrate animal having an exoskeleton, a segmented body, and paired jointed appendages.
Argentina (Spanish: [aɾxenˈtina]), officially the Argentine Republic (Spanish: República Argentina), is a country located mostly in the southern half of South America.
Arabic (Arabic: ٱلْعَرَبِيَّة, al-ʿarabīyah, [al ʕaraˈbijːa] (listen) or عَرَبِيّ, ʿarabīy, [ˈʕarabiː] (listen) or [ʕaraˈbij]) is a Semitic language that first emerged in the 1st to 4th centuries CE.
Arnold Alois Schwarzenegger (; German: [ˈaʁnɔlt ˈʃvaʁtsn̩ˌʔɛɡɐ]; born July 30, 1947) is an Austrian-American actor, filmmaker, businessman, author, and former professional bodybuilder and politician.
Ariana Grande-Butera (; born June 26, 1993) is an American singer, songwriter, and actress. Born in Boca Raton, Florida, Grande began her career in 2008 in the Broadway musical 13. She rose to prominence for her role as Cat Valentine in the Nickelodeon television series Victorious (2010–2013) and in its spin-off, Sam & Cat (2013–2014).
In computer science, artificial intelligence (AI), sometimes called machine intelligence, is intelligence demonstrated by machines, in contrast to the natural intelligence displayed by humans.
Arizona ( (listen); Navajo: Hoozdo Hahoodzo Navajo pronunciation: [xòːztò xɑ̀xòːtsò]; O'odham: Alĭ ṣonak Uto-Aztecan pronunciation: [ˡaɺi ˡʂonak]) is a state in the southwestern region of the United States.
Architecture (Latin architectura, from the Greek ἀρχιτέκτων arkhitekton "architect", from ἀρχι- "chief" and τέκτων "creator") is both the process and the product of planning, designing, and constructing buildings or any other structures.