QR

QR may stand for:

• Qatar Airways, IATA code QR
• Queensland Rail, QR Limited, responsible for the railway system in Queensland, Australia
• 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, 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, student radio station at Queen's University Belfast
• Queen's Rangers, a military unit who fought in the American War of Independence
• QR Code, a two-dimensional bar 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

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.