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

Arts, entertainment, and mediaEdit

MusicEdit

PeriodicalsEdit

Other mediaEdit

BusinessEdit

LanguageEdit

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

Mathematics, science, and technologyEdit

ComputingEdit

Biology and medicineEdit

MathematicsEdit

Physics and chemistryEdit

Other uses in science and technologyEdit

Military and weaponsEdit

PlacesEdit

Politics and ethicsEdit

Other usesEdit