AR, Ar, or A&R may refer to:
An arthropod (from Greek arthro-, joint + podos, foot) is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages (paired appendages).
Argentina (/ˌɑːrdʒənˈtiːnə/; Spanish: [aɾxenˈtina]), officially the Argentine Republic (Spanish: República Argentina), is a federal republic in the southern half of South America.
Arabic (Arabic: العَرَبِيَّة, al-ʻarabiyyah [ʔalʕaraˈbij.ja] or Arabic: عَرَبِيّ ʻarabī [ˈʕarabiː, ʕaraˈbij]) is a Central Semitic language that was first spoken in Iron Age northwestern Arabia and is now the lingua franca of the Arab world.
Arsenal Football Club is a professional football club based in Highbury, London, that plays in the Premier League, the top flight of English football.
Artificial intelligence (AI) is intelligence exhibited by machines. In computer science, the field of AI research defines itself as the study of "intelligent agents": any device that perceives its environment and takes actions that maximize its chance of success at some goal.
Arizona (/ɛərᵻˈzoʊnə, ærᵻ-/) (Navajo: Hoozdo Hahoodzo [xòːztò xɑ̀xòːtsò]; O'odham: Alĭ ṣonak [ˡaɺi ˡʃonak]) is a state in the southwestern region of the United States.
The United States Air Force facility commonly known as Area 51 is a highly classified remote detachment of Edwards Air Force Base, within the Nevada Test and Training Range.
Ariana Grande-Butera (born June 26, 1993), known professionally as Ariana Grande (/ˌɑːriˈɑːnə ˈɡrɑːndeɪ/), is an American singer and actress.
Aristotle (/ˈærɪˌstɒtəl/; Greek: Ἀριστοτέλης Greek pronunciation: [aristotélɛːs], Aristotélēs; 384–322 BC) was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidice, on the northern periphery of Classical Greece.