AR

AR, Ar, or A&R may refer to:

Arts, entertainment, and media

Music

Periodicals

Other media

Business

Language

  • Ar, the Latin letter R when spelled out
  • Ar (cuneiform), a cuneiform combined sign
  • Arabic, by ISO 639-1 language code

Mathematics, science, and technology

Computing

Biology and medicine

Mathematics

Physics and chemistry

Other uses in science and technology

Military and weapons

Places

Politics and ethics

Other uses