QR
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(Redirected from Qr)
QR may stand for:
- Qatar Airways IATA code
- Queensland Rail, a company responsible for the railway system in Queensland, Australia
- Queen's Regulations, a guidance on conduct in the UK's armed forces
- Queensrÿche, a progressive metal band
- Karakalpakstan (Qoraqalpog'iston Respublikasi), Uzbekistan, under ISO 3166-2 subcode UZ-QR
- Nippon Cultural Broadcasting, a Tokyo radio station, from call sign JOQR
- Quintana Roo, a state of Mexico
- Quintana Roo (company), a triathlon-specific wetsuit and bicycle company
- Quick release skewer, a device used to secure the wheels on a bicycle
- Quiet Riot, a heavy metal band
- Quarterly Review, a defunct literary and political periodical
- Queen's Radio, a student radio station at Queen's University Belfast
- Queen's Rangers, a military unit who fought in the American War of Independence
- QR code ('Quick Response code'), a two-dimensional code
- Nissan QR engine
- ATCvet code QR Respiratory system, a section of the Anatomical Therapeutic Chemical Classification System for veterinary medicinal products
- In mathematics:
- QR decomposition, a decomposition of a matrix
- QR algorithm, an eigenvalue algorithm using QR decomposition
- Quadratic reciprocity, a theorem from modular arithmetic
- Quasireversibility, a property of some queues
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