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 (external skeleton), 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.
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.
Arnold Alois Schwarzenegger (; German: [ˈaɐ̯nɔlt ˈʃvaɐ̯tsn̩ˌʔɛɡɐ]; born July 30, 1947) is an Austrian-American politician, actor, filmmaker, and former professional bodybuilder.
Arabic (Arabic: العَرَبِيَّة, al-ʻarabiyyah, [al ʕaraˈbijja] (listen) or عَرَبِيّ, ʻarabī, [ˈʕarabiː] (listen) or [ʕaraˈbij]) is a Semitic language that first emerged in the 1st to 4th centuries CE.
Ariana Grande-Butera (; born June 26, 1993) is an American singer, songwriter, and actress. A multi-platinum, Grammy Award-winning recording artist, she is known for her wide vocal range, which critics have often compared to that of Mariah Carey.
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.