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 the Argentine Republic (Spanish: República Argentina), is a federal republic in the southern portion of South America.
Arabic (Arabic: العَرَبِيَّة, al-ʻarabiyyah [ʔalʕaraˈbijːah] or Arabic: عَرَبِيّ ʻarabī [ˈʕarabiː] or [ʕaraˈbijː]) is a Central Semitic language complex that first emerged in Iron Age northwestern Arabia and is now the lingua franca of the Arab world.
Arnold Alois Schwarzenegger (; German: [ˈaɐ̯nɔlt ˈalɔʏs ˈʃvaɐ̯tsn̩ˌɛɡɐ]; born July 30, 1947) is an Austrian-American actor, producer, businessman, investor, author, philanthropist, activist, politician, and former professional bodybuilder who holds both Austrian and American citizenship.
Artificial intelligence (AI, also machine intelligence, MI) is intelligence exhibited by machines, rather than humans or other animals (natural intelligence, NI).
Arizona (; Navajo: Hoozdo Hahoodzo [xòːztò xɑ̀xòːtsò]; O'odham: Alĭ ṣonak [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 "builder") is both the process and the product of planning, designing, and constructing buildings and other physical structures.
The Armenian Genocide (Armenian: Հայոց ցեղասպանություն, Hayots tseghaspanutyun), also known as the Armenian Holocaust, was the Ottoman government's systematic extermination of 1.5 million Armenians, mostly Ottoman citizens within the Ottoman Empire and its successor state, the Republic of Turkey.