TR or tr may stand for

Arts and entertainment

Gaming

* ''

Tomb Raider ''Tomb Raider'', known as ''Lara Croft: Tomb Raider'' from 2001 to 2008, is a media franchise that originated with an Action-adventure game, action-adventure video game series created by British video game developer Core Design. The franchise i ...

'', a video game franchise *

Terminal Reality Terminal Reality is an American video game development and Video game producer, production company based in Lewisville, Texas. Founded in October 1994 by ex-Microsoft employee Mark Randel and former Mallard Software general manager Brett Combs, ...

, an American video game developer * A currency in online game '' TalesRunner'' * Terran Republic (''PlanetSide''), a faction in the video game series ''PlanetSide''

Music

* Korg TR, a variant of the

Korg Triton The Korg Triton is a music workstation synthesizer, featuring digital sampling and sequencing, released in 1999. It uses Korg's "HI (Hyper Integrated) Synthesis" system and was eventually available in several model variants with numerous upgrade o ...

music workstation synthesizer *

Trill TRILL (Transparent Interconnection of Lots of Links) is a networking protocol for optimizing bandwidth and resilience in Ethernet networks, implemented by devices called TRILL switches. TRILL combines techniques from bridging and routing, and ...

, notation for musical ornament * TR-808,

TR-909 The Roland TR-909 Rhythm Composer, commonly known as the 909, is a drum machine introduced by Roland Corporation in 1983, succeeding the Roland TR-808, TR-808. It was the first Roland drum machine to use Sampling (music), samples for some sounds, ...

etc., 1980s Roland drum machines

Businesses and organizations

Scoot Scoot Pte Ltd, operating as Scoot, is a low-cost airline based in Singapore and a subsidiary of the country's flag carrier Singapore Airlines. It began its operations on 4 June 2012 on medium and long-haul routes from Singapore, predominantly t ...

, IATA code since 2017 * Tiger Airways, IATA code between 2003 and 2017 *

Tomahawk Railway The Tomahawk Railway is the trade name employed by Genesee & Wyoming to operate of railroad in northern Wisconsin. History The Tomahawk Railway, currently owned by Genesee & Wyoming has roots dating back to 1891, when the founder, William H. ...

, reporting mark *

Transbrasil TransBrasil was a Brazilian airline which ceased operations on 3 December 2001. During most of its history, Transbrasil was owned by local entrepreneur Omar Fontana. Its aircraft usually featured a colorful livery, remarkably with a rainbow on t ...

, IATA airline code until 2001 * Team Rubicon, commonly used abbreviation *

Talyllyn Railway The Talyllyn Railway () is a narrow-gauge railway in Wales running for from Tywyn on the Mid-Wales coast to Nant Gwernol railway station, Nant Gwernol near the village of Abergynolwyn. The line was opened in 1865Drummond 2015, page 17 to carr ...

, a Welsh railway *

Thomson Reuters Thomson Reuters Corporation ( ) is a Canadian multinational corporation, multinational content-driven technology Conglomerate (company), conglomerate. The company was founded in Toronto, Ontario, Canada, and maintains its headquarters at 1 ...

, a Canadian multinational media conglomerate * Texas Roadhouse, restaurant chain in the United States * Tokyu Railways. See

Tokyu Corporation The , a contraction of and formerly until 2 September 2019, is a Japanese ''keiretsu'' or conglomerate headquartered in Shibuya, Tokyo. While a multinational corporation, its main operation is , a wholly-owned subsidiary operating railways i ...

Language

* Tr, a digraph *

Turkish language Turkish ( , , also known as 'Turkish of Turkey') is the most widely spoken of the Turkic languages, a member of Oghuz languages, Oghuz branch with around 90 million speakers. It is the national language of Turkey and one of two official languag ...

(ISO 639 alpha-1 code "tr")

People

Theodore Roosevelt Theodore Roosevelt Jr. (October 27, 1858 – January 6, 1919), also known as Teddy or T.R., was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York (state), New York politics, incl ...

, the 26th president of the United States **

Presidency of Theodore Roosevelt Theodore Roosevelt's tenure as the 26th president of the United States began on September 14, 1901, and expired on March 4, 1909. Roosevelt, a Republican Party (United States), Republican, took office upon the Assassination of William McKinley, a ...

, 1901-1909 ** The , a ''Nimitz''-class aircraft carrier * T. Rajendar, Indian filmmaker and politician * T. Ramachandran (writer) (1944–2000), Indian writer who wrote under these initials

Places

TR postcode area The TR postcode area, also known as the Truro postcode area, is a group of 27 postcode districts in South West England, within 15 post towns. These cover west Cornwall, including Truro, Penzance, Camborne, Falmouth, Hayle, Helston, Marazion, N ...

, UK postal code for the Truro area *

Travelers Rest, South Carolina Travelers Rest is a city in Greenville County, South Carolina, Greenville County, South Carolina. Its population was 7,788 at the 2020 census. It is part of the Greenville-Mauldin-Easley Metropolitan Statistical Area. Travelers Rest, the northern ...

* ISO 3166-1 alpha-2 country code of

Turkey Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...

* Vehicle registration code of

Tripura Tripura () is a States and union territories of India, state in northeastern India. The List of states and union territories of India by area, third-smallest state in the country, it covers ; and the seventh-least populous state with a populat ...

, a state of India

Transportation

Taiwan Railway Taiwan Railway (TR) is a state-owned conventional railway in Taiwan. It is operated by the Taiwan Railway Corporation under the supervision of the Ministry of Transportation and Communications (Republic of China), Ministry of Transportation and ...

, a state-owned conventional railway in Taiwan

Science, technology, and mathematics

Biology and medicine

Thyroid hormone receptor The thyroid hormone receptor (TR) is a type of nuclear receptor that is activated by binding thyroid hormone. TRs act as transcription factors, ultimately affecting the regulation of gene transcription and translation. These receptors also have ...

, a nuclear receptor *

Tricuspid regurgitation Tricuspid regurgitation (TR), also called tricuspid insufficiency, is a type of valvular heart disease in which the tricuspid valve of the heart, located between the right atrium and right ventricle, does not close completely when the right ventr ...

, within the heart * Repetition time,

magnetic resonance imaging Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to generate pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic fields, magnetic field gradients, and ...

Taxonomic rank In biology, taxonomic rank (which some authors prefer to call nomenclatural rank because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of or ...

Computing

* .tr, the country code top level domain (ccTLD) for Turkey *

tr (Unix) tr is a command in Unix, Plan 9, Inferno, and Unix-like operating systems. It is an abbreviation of ''translate'' or ''transliterate'', indicating its operation of replacing or removing specific characters in its input data set. Overview The u ...

, command to transliterate characters * Table row, an

HTML element An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment nodes and others). The first used version of HTML was written by Tim Berners-Lee in 199 ...

Vehicles

Thai Rung Union Car Thai Rung Union Car (), formerly known as Thai Motor Corporation (THAMCO), is the first and so far only Thai-based automobile manufacturer, established in 1967 to assemble British Leyland, Leyland vehicles and later Isuzu, Toyota, Nissan, and C ...

Toronto Rocket The Toronto Rocket (TR) is the fifth and latest series of rolling stock used in the Toronto subway system in Toronto, Ontario, Canada. Owned and operated by the Toronto Transit Commission (TTC), the trains were built by Bombardier Transporta ...

, a rolling stock of the Toronto subway *

Triumph Motor Company The Triumph Motor Company was a British car and motor manufacturing company in the 19th and 20th centuries. The marque had its origins in 1885 when Siegfried Bettmann of Nuremberg formed S. Bettmann & Co. and started importing bicycles from Eur ...

. a sports car designation, e.g. TR2 * Ferrari ''TR'' (set index), several cars * Berliet TR, a range of heavy-duty trucks

Other uses in science, technology, finance, and mathematics

* TR-1, a version of the

Lockheed U-2 The Lockheed U-2, nicknamed the "''Dragon Lady''", is an American single-engine, high–altitude reconnaissance aircraft operated by the United States Air Force (USAF) and the Central Intelligence Agency (CIA) since the 1950s. Designed for all- ...

aircraft * Technical Report, a type of

ISO The International Organization for Standardization (ISO ; ; ) is an independent, non-governmental, international standard development organization composed of representatives from the national standards organizations of member countries. Me ...

document *

Trace (linear algebra) In linear algebra, the trace of a square matrix , denoted , is the sum of the elements on its main diagonal, a_ + a_ + \dots + a_. It is only defined for a square matrix (). The trace of a matrix is the sum of its eigenvalues (counted with mu ...

Ton of refrigeration A ton of refrigeration (TR or TOR), also called a refrigeration ton (RT), is a unit of power used in some countries (especially in North America) to describe the heat-extraction rate of refrigeration and air conditioning equipment. It was origin ...

Total return The total return on a portfolio of investments takes into account both the capital appreciation on the portfolio, and the income received on the portfolio. The income typically consists of interest, dividends, and securities lending fees. This co ...

Other uses

Textus Receptus The (Latin for 'received text') is the succession of printed Greek New Testament texts starting with Erasmus' ''Novum Instrumentum omne'' (1516) and including the editions of Robert Estienne, Stephanus, Theodore Beza, Beza, the House of Elzevir ...

: Printed Greek New Testament translation sources *

Training routines (Scientology) The training routines (TR) are training exercises or drills used in the Church of Scientology as well as affiliated programs Narconon, Criminon, WISE, and Applied Scholastics. The church describes them as a way of learning to communicate effect ...

Tax return A tax return is a form on which a person or organization presents an account of income and circumstances, used by the tax authorities to determine liability for tax. Tax returns are usually processed by each country's tax authority, known as ...

Tax refund A tax refund is a payment to the taxpayer due because the taxpayer has paid more taxes than owed. United States According to the Internal Revenue Service, 77% of tax returns filed in 2004 resulted in a refund check, with the average refund c ...