CRT or Crt may refer to:

Science, technology, and mathematics

Medicine and biology

Calreticulin Calreticulin also known as calregulin, CRP55, CaBP3, calsequestrin-like protein, and endoplasmic reticulum resident protein 60 (ERp60) is a protein that in humans is encoded by the ''CALR'' gene. Calreticulin is a multifunctional soluble prote ...

, a protein *

Capillary refill Capillary refill time (CRT) is defined as the time taken for color to return to an external capillary bed after pressure is applied to cause blanching. It can be measured by holding a hand higher than heart-level and pressing the soft pad of a f ...

time, for blood to refill capillaries *

Cardiac resynchronization therapy Cardiac resynchronisation therapy (CRT or CRT-P) is the insertion of electrodes in the left and right ventricles of the heart, as well as on occasion the right atrium, to treat heart failure by coordinating the function of the left and right ve ...

and CRT defibrillator (CRT-D) * Catheter-related thrombosis, the development of a blood clot related to long-term use of central venous catheters *

Certified Respiratory Therapist A Certified Respiratory Therapist (CRT), formerly Certified Respiratory Therapy Technician (CRTT), is a therapist who has graduated from a respiratory therapy program at a university or college and has passed a national certification exam. A CRT or ...

Chemoradiotherapy Chemoradiotherapy (CRT, CRTx, CT-RT) is the combination of chemotherapy and radiotherapy to treat cancer. Synonyms include radiochemotherapy (RCT, RCTx, RT-CT) and chemoradiation. It is a type of multimodal cancer therapy. Chemoradiation can b ...

, chemo- and radiotherapy combined *

Cognitive Retention Therapy Cognitive Retention Therapy (CRT) also known as the Ashby Memory Method is a Cognitive therapy for dementia, based on the research of Dr. Mira Ashby. It is adapted from her programs for brain injury rehabilitation, for which she won the Order of ...

, for dementia * Corneal Refractive Therapy, in optometrics *

CRT (genetics) CRT is the gene cluster responsible for the biosynthesis of carotenoids. Those genes are found in eubacteria,Carotenoid biosynthetic pathway: molecular phylogenies and evolutionary behavior of crt genes in eubacteria. Phadwal K, Gene, 17 January 2 ...

, a gene cluster

Mathematics and technology

Cathode-ray tube A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. The images may represent electrical waveforms (oscilloscope), pictur ...

, a display *

Chinese remainder theorem In mathematics, the Chinese remainder theorem states that if one knows the remainders of the Euclidean division of an integer ''n'' by several integers, then one can determine uniquely the remainder of the division of ''n'' by the product of thes ...

in number theory * Microsoft C Run-Time library *

SecureCRT SecureCRT is a commercial SSH and Telnet client and terminal emulator by VanDyke Software. Originally a Windows product, VanDyke later added a Mac OS X version in 2010 with release v6.6 and a Linux version in 2011 with release v6.7. History Sec ...

, formerly CRT, a telnet client * .crt, X.509 Certificate filename extension

Social sciences

Cognitive reflection test The cognitive reflection test (CRT) is a task designed to measure a person's tendency to override an incorrect "gut" response and engage in further reflection to find a correct answer; however, the validity of the assessment as a measure of "cogni ...

, in psychology *

Critical race theory Critical race theory (CRT) is a cross-disciplinary examination, by social and civil-rights scholars and activists, of how laws, social and political movements, and media shape, and are shaped by, social conceptions of race and ethnicity. Goa ...

, an academic framework of analysis *

Current reality tree (theory of constraints) One of the thinking processes in the theory of constraints, a current reality tree (CRT) is a tool to analyze many systems or organizational problems at once. By identifying root causes common to most or all of the problems, a CRT can greatly aid ...

, in process management

Transport

Canal & River Trust The Canal & River Trust (CRT), branded as in Wales, holds the guardianship of 2,000 miles of canals and rivers, together with reservoirs and a wide range of heritage buildings and structures, in England and Wales. Launched on 12 July 2012, the ...

, England and Wales *

Changchun Rail Transit Changchun Rail Transit, is the rapid transit and light rail system in the city of Changchun, Jilin Province, China. Its first line, Line 3, is the first true light rail line in Mainland China. The system consists of three light rail lines a ...

, China *

Chongqing Rail Transit The Chongqing Rail Transit (branded as CRT; also known as Chongqing Metro) is the rapid transit system in the city of Chongqing, China. In operation since 2005, it serves the transportation needs of the city's main business and entertainment ...

, China *

Connecticut River Transit Connecticut () is the southernmost state in the New England region of the Northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its capita ...

, former bus service in Vermont, US * Former

Cross River Tram Cross River Tram (formerly Cross River Transit) was a Transport for London (TfL) proposal for a tram system in London. It was planned to run on a north–south route from Camden Town in the north, via King's Cross, to Peckham and Brixton in th ...

project, London *

CRT Group CRT Group is an intermodal transport company in Australia. It was founded in 1954 as Colin Rees Transport, a taxi truck company in Sydney. In 1981 it became known as the CRT Group, and by the time of its acquisition by QR National in June 2005, ...

, transport company in Australia *

Chicago Rapid Transit Company The Chicago Rapid Transit Company (CRT) was a privately owned firm providing rapid transit rail service in Chicago, Illinois and several adjacent communities between 1924 and 1947. The CRT is one of the predecessors of the Chicago Transit Autho ...

, former rail company

Other uses

Canadian Railway Troops The Corps of Canadian Railway Troops were part of the Canadian Expeditionary Force (CEF) during World War I. Although Canadian railway units had been arriving in France since August 1915, it was not until March 1917 that the units were placed under ...

, WWI * Charitable remainder trust *

Claiming Rule Teams The 2012 MotoGP World Championship season was the 64th F.I.M. Road Racing World Championship season. Casey Stoner started the season as the defending World Champion, while Honda was the defending Manufacturers' Champion. In the premier MotoGP c ...

, in motorcycle racing *

Columbia River Treaty The Columbia River Treaty is a 1961 agreement between Canada and the United States on the development and operation of dams in the upper Columbia River basin for power and flood control benefits in both countries. Four dams were constructed under ...

, Canada-US, 1960s *

Connecticut Repertory Theatre Connecticut Repertory Theatre (CRT) at the Storrs campus of the University of Connecticut is a professional theatre run by the Department of Dramatic Arts, a part of the School of Fine Arts. Its current artistic director is Megan Monaghan Rivas; pa ...

, University of Connecticut * Correctional Emergency Response Team * An abbreviation for

Crater (constellation) Crater is a small constellation in the southern celestial hemisphere. Its name is the latinization of the Greek ''krater'', a type of cup used to water down wine. One of the 48 constellations listed by the second-century astronomer Ptolemy, it dep ...

Iyojwaʼja Chorote Eklenhui (Iyojwaja Chorote) is a language spoken in northeast Salta in Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers ...

, a language in Salta province, Argentina, ISO 639 code {{disambiguation