- QR
QR may stand for:
*
Quintana Roo (company) , a triathlon-specific wetsuit and bicycle company
*Karakalpakstan (Qoraqalpog'iston Respublikasi), Uzbekistan, under ISO 3166-2 subcode UZ-QR
*Nippon Cultural Broadcasting , inc., a radio network in Tokyo, Japan, abbreviated "QR" from call sign JOQR
*Nissan QR engine
*Provisional designation in astronomy , which uses "QR" as the suffix for the 17th object found in the second half of August in a given year
*"Quarterly Review "
*Qatar Airways , as IATA code QR
*Queen's Radio , Student Radio station at Queen's University Belfast
*Queensland Rail , QR Limited, the company government-owned corporation responsible for the operation and maintenance of the railway system in Queensland, Australia
*Queen's Rangers
*Quick release
*Quiet Riot , a heavy metal band
*QR Code , a two-dimensional bar code
* Inmathematics :
**QR algorithm , an eigenvalue algorithm
**QR decomposition , a decomposition of a matrix into an orthogonal and a triangular factor
**Quadratic reciprocity
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