CTR may refer to:

Engineering, science and technology

  • Counter mode (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, Naughty Dog's 1999 video game for the Sony PlayStation
  • Crash Team Racing Nitro-Fueled, its 2019 remake

Medicine

  • Cardiac resynchronization therapy
  • Cardio-thoracic ratio, a measure of the size of heart
  • Carpal tunnel release, surgery for treating carpal tunnel syndrome
  • Cervico-thoracic ratio, a measure of segmental mobility in the spine
  • Clinical trials registry, 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, a company that was renamed IBM in 1924

Transport

  • Aerolíneas Centauro (ICAO airline designator: CTR), an airline in Mexico
  • Cattle Creek Airport (IATA airport code: CTR), an airport in Australia
  • 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, a car manufactured by Honda
  • Ruf CTR, a car by Ruf Automobile of Germany

Other uses

  • Click-through rate, a measure of the success of an online advertising campaign
  • "Choose the right", a common Latter Day Saint saying, often found on a CTR ring
  • Close target reconnaissance, a military term for scouting in extremely close proximity to the target
  • Competitive trail riding, an equestrian sport
  • Costa Rica, ITU country code

See also

  • Center (disambiguation) (Center or Centre) for which CTR is an abbreviation of several values <!--"Ctr" can be shorthand for center. For example, see "Vernon C Bain Correctional Ctr" -> "Vernon C. Bain Correctional Center" from https://www2.census.gov/geo/maps/DC2020/DC20BLK/st36_ny/county/c36005_bronx/DC20BLK_C36005.pdf PDF p. 11/17 - The U.S. Census Bureau uses "ctr" to mean "Center" -->
  • Control (disambiguation) for which CTR is an abbreviation of several values
  • CTRS