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.
Ariana Grande-Butera (; born June 26, 1993) is an American singer, songwriter,
Argentina (Spanish: [aɾxenˈtina]), officially named the Argentine Republic (Spanish: República Argentina), is a country located mostly in the southern half of South America.
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.
Arnold Alois Schwarzenegger (; German: [ˈaɐ̯nɔlt ˈʃvaɐ̯tsn̩ˌʔɛɡɐ]; born July 30, 1947) is an Austrian-American actor, filmmaker, businessman, author, philanthropist, activist, politician, and former professional bodybuilder and powerlifter.
In the field of computer science, artificial intelligence (AI), sometimes called machine intelligence, is intelligence demonstrated by machines, in contrast to the natural intelligence displayed by humans and other animals.
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.
Aristotle (;Greek: Ἀριστοτέλης Aristotélēs,pronounced [ aristotélɛːs ]; 384–322 BC) was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidiki, Greece.