AR

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

Arts, entertainment, and media[edit]

Music[edit]

Periodicals[edit]

Other media[edit]

Business[edit]

Language[edit]

  • 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[edit]

Computing[edit]

Biology and medicine[edit]

Mathematics[edit]

Physics and chemistry[edit]

Other uses in science and technology[edit]

Military and weapons[edit]

Places[edit]

Politics and ethics[edit]

Other uses[edit]