QR may refer to:
Arts and entertainment
Nippon Cultural Broadcasting (from call sign JOQR), a Tokyo radio station Queen's Radio, a student radio station at Queen's University, Belfast Quiet Riot, an American rock band
Businesses Qatar Airways (IATA code) Queensland Rail, a company responsible for the railway system in Queensland, Australia Quintana Roo (company), a triathlon-specific wetsuit and bicycle company
Places Quintana Roo, a state of Mexico Karakalpakstan (Qoraqalpog'iston Respublikasi), Uzbekistan (ISO 3166-2 subcode UZ-QR)
Science and technology QR code (Quick Response code), a two-dimensional code ATCvet code QR Respiratory system, a section of the Anatomical Therapeutic Chemical Classification System for veterinary medicinal products DICOM Q/R, DICOM Query / Retrieve Nissan QR engine Quarter (unit)
qr., , of a yard, equal to 9 inches qr. av., , of a hundredweight, equal to 2 stone or 28 pounds avoirdupois
Mathematics QR decomposition, a decomposition of a matrix QR algorithm, an eigenvalue algorithm to perform QR decomposition Quadratic reciprocity, a theorem from modular arithmetic Quasireversibility, a property of some queues Reaction quotient (Qr), a function of the activities or concentrations of the chemical species involved in a chemical reaction
Other uses Quarterly Review, a defunct literary and political periodical Qatari riyal, the currency of Qatar
See also
QRS (disambiguation)