Editing QR

{{wiktionary}}
'''QR''' may refer to:
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==Arts and entertainment==
<!--* [[Queensrÿche]], a progressive metal band (fails [[WP:DABACRO]])-->
* [[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 <!--(fails [[WP:DABACRO]], albums are borderline [[WP:PTM]])-->

==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
<!---->
<!--* ==Military==-->
<!--* [[Queen's Rangers]], a military unit who fought in the American War of Independence (fails [[WP:DABACRO]])-->
<!--* * ''[[Queen's Regulations]]'', a guidance on conduct in the UK's armed forces (fails [[WP:DABACRO]])-->

==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., {{slink| Quarter (unit) # Length }}, {{Frac|1|4}} of a yard, equal to 9 inches
** qr. av., {{slink| Quarter (unit) # Weight}}, {{Frac|1|4}} 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]] (Q<sub>r</sub>), 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==
{{canned search|qr|q-r}}
* {{srt}}
* [[QRS (disambiguation)]]

{{disambiguation}}