CTR may refer to:

Engineering, science and technology

Counter mode In cryptography, a block cipher mode of operation is an algorithm that uses a block cipher to provide information security such as confidentiality or authenticity. A block cipher by itself is only suitable for the secure cryptographic transform ...

(CTR mode), a cryptographic mode of operation for block ciphers * X-ray crystal truncation rod, a technique to measure properties of crystal surfaces * Current transfer ratio, in an opto-isolator device * Content Threat Removal, a cyber security technology that defeats content threats

Government

* Cooperative Threat Reduction, an initiative to secure and dismantle weapons of mass destruction in former Soviet Union states * Currency transaction report, a report about transactions that the Bank Secrecy Act requires U.S. financial institutions to file with the Internal Revenue Service

Media, arts and entertainment

* '' Contemporary Theatre Review'', a British academic journal of performing arts * ''

Crash Team Racing ''Crash Team Racing'' (stylized as ''CTR: Crash Team Racing'') is a 1999 kart racing video game developed by Naughty Dog and published by Sony Computer Entertainment for the PlayStation. It is the fourth installment in the ''Crash Bandicoot'' ...

'', Naughty Dog's 1999 video game for the Sony PlayStation ** ''

Crash Team Racing Nitro-Fueled ''Crash Team Racing Nitro-Fueled'' is a 2019 kart racing game developed by Beenox and published by Activision. The game is a remastered version of '' Crash Team Racing'', which was originally developed by Naughty Dog for the PlayStation in 1999 ...

'', its 2019 remake

Medicine

* Cardiac resynchronization therapy * Cardio-thoracic ratio, a measure of the size of heart *

Carpal tunnel release Carpal tunnel surgery, also called carpal tunnel release (CTR) and carpal tunnel decompression surgery, is a surgery in which the transverse carpal ligament is divided. It is a surgical treatment for carpal tunnel syndrome (CTS) and recommended whe ...

, surgery for treating carpal tunnel syndrome *

Clinical trials registry Preregistration is the practice of registering the hypotheses, methods, and/or analyses of a scientific study before it is conducted. This can include analyzing primary data or secondary data. Clinical trial registration is similar, although it may ...

, an official catalog for studies about health interventions, such as drugs

Organizations

* Center for Transportation Research UT Austin, a research center at the University of Texas at Austin, US * Center for Turbulence Research, a research institute at Stanford University, US * Correct the Record, an American political action committee which supported Hillary Clinton's 2016 presidential campaign *

Computing-Tabulating-Recording Company The Computing-Tabulating-Recording Company (CTR) was a holding company of manufacturers of record-keeping and measuring systems subsequently known as IBM. In 1911, financier and noted trust organizer, "Father of Trusts", Charles R. Flint ama ...

, a company that was renamed IBM in 1924

Transport

* Aerolíneas Centauro (

ICAO airline designator This is a list of airline codes. The table lists IATA's two-character airline designators, ICAO's three-character airline designators and the airline call signs (telephony designator). Historical assignments are also included.ht IATA airli ...

), an airline in Mexico * Cattle Creek Airport, Australia (IATA code CTR) * Controlled traffic region, a controlled airspace zone, typically around airports * Carlton Trail Railway, a Saskatchewan, US shortline railway * Chester railway station (station code), England

Automobile models

Honda Civic Type R The is a series of high-performance hatchback/ sedan models based on the Civic, developed and produced by Honda since September 1997. The first Civic Type R was the third model to receive Honda's Type R badge (after the NSX and Integra). Typ ...

, a car manufactured by Honda *

Ruf CTR The Ruf CTR (Group C, Turbo Ruf) also known as the CTR Yellowbird or simply Yellowbird, is a limited-production, high performance sports car manufactured by German automobile manufacturer Ruf Automobile. Introduced for the 1987 model year and bas ...

, a car by Ruf Automobile of Germany

Other uses

Click-through rate Click-through rate (CTR) is the ratio of users who click on a specific link to the number of total users who view a page, email, or advertisement. It is commonly used to measure the success of an online advertising campaign for a particular we ...

, a measure of the success of an online advertising campaign * "

Choose the right "Choose the right" is a saying or motto among members of the Church of Jesus Christ of Latter-day Saints (LDS Church) that is taught to children and used by members of the church as a reminder to make choices that will help an individual to live r ...

", a common Latter Day Saint saying, often found on a CTR ring * Close target

reconnaissance In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, terrain, and other activities. Examples of reconnaissance include patrolling by troops (skirmisher ...

, a military term for scouting in extremely close proximity to the target *

Competitive trail riding Competition is a rivalry where two or more parties strive for a common goal which cannot be shared: where one's gain is the other's loss (an example of which is a zero-sum game). Competition can arise between entities such as organisms, indivi ...

, an equestrian sport * Costa Rica, ITU country code {{disambiguation