Communication
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# QR

QR may stand for. [1]

## ATC code R

R.

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## DICOM

Digital Imaging and Communications in Medicine (DICOM) is the standard for the communication and management of medical imaging information and related data.

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## Karakalpakstan

Karakalpakstan (Qaraqalpaqstan / Қарақалпақстан), officially the Republic of Karakalpakstan (Qaraqalpaqstan Respublikası / Қарақалпақстан Республикасы) is an autonomous republic within Uzbekistan.

is a Japanese radio station in Tokyo which broadcasts to the Kanto area.

## Nissan QR engine

The QR family of inline-four piston engines by Nissan were introduced in 2000 and range from 2.0 L to 2.5 L in displacement.

## Qatar Airways

Qatar Airways Company Q.C.S.C. (القطرية, Al Qatariyah), operating as Qatar Airways, is the state-owned flag carrier of Qatar.

## Qatari riyal

The Qatari riyal is the currency of the State of Qatar.

## QR algorithm

In numerical linear algebra, the QR algorithm is an eigenvalue algorithm: that is, a procedure to calculate the eigenvalues and eigenvectors of a matrix.

## QR code

QR code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional barcode) first designed in 1994 for the automotive industry in Japan.

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## QR decomposition

In linear algebra, a QR decomposition (also called a QR factorization) of a matrix is a decomposition of a matrix A into a product A.

In number theory, the law of quadratic reciprocity is a theorem about modular arithmetic that gives conditions for the solvability of quadratic equations modulo prime numbers.

## Quarterly Review

The Quarterly Review was a literary and political periodical founded in March 1809 by the well known London publishing house John Murray.

## Quasireversibility

In queueing theory, a discipline within the mathematical theory of probability, quasireversibility (sometimes QR) is a property of some queues.

Queen's Radio (or QR) is a student radio station, broadcasting a wide variety of shows, based at Queen's University, Belfast, Northern Ireland, currently broadcasting via online stream.

## Queen's Rangers

The Queen's Rangers, also known as the Queen's American Rangers, and later Simcoe's Rangers, were a military unit that fought in the Seven Years' War and on the Loyalist side during the American Revolutionary War.

## Queen's Regulations

The Queen's Regulations (first published in 1731 and known as the King's Regulations when the United Kingdom has a king) is a collection of orders and regulations in force in the Royal Navy, British Army, Royal Air Force, and Commonwealth Forces, where the Queen is Head of State, forming guidance for officers of these armed services in all matters of discipline and personal conduct.

## Queensland Rail

Queensland Rail, also known as QR, is a railway operator in Queensland, Australia.

## Queensrÿche

Queensrÿche performing at the Sauna Open Air Metal Festival on June 11, 2011, in Tampere, Finland. Left to right: bassist Eddie Jackson, lead vocalist Geoff Tate, drummer Scott Rockenfield and guitarist Michael Wilton. Queensrÿche is an American heavy metal band.

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## Quick release skewer

A quick release skewer is a mechanism for attaching a wheel to a bicycle.

## Quiet Riot

Quiet Riot is an American heavy metal band.

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## Quintana Roo

Quintana Roo, officially the Free and Sovereign State of Quintana Roo (Estado Libre y Soberano de Quintana Roo), is one of the 31 states which, with the Federal District, make up the 32 federal entities of Mexico.

## Quintana Roo (company)

Quintana Roo was the first company to create a triathlon-specific wetsuit over 25 years ago, and then a tri-specific bicycle two years later.

## Reaction quotient

In chemistry, a reaction quotient (Qr or just Q) is a function of the activities or concentrations of the chemical species involved in a chemical reaction.

## References

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