TC

The abbreviations TC or T.C. may refer to multiple meanings:

In biology:
* Testicular Cancer
* Therapeutic Community, a treatment programme for addictions, personality disorder or other mental problems
* Total Cholesterol

In chemistry and physics:
* Technetium (symbol Tc), a chemical element
* Temperature coefficient
* Teracoulomb, an SI unit for electric charge equal to 10<sup>12 coulombs
* Tesla coil, a category of high-voltage discharge coils
* Thermocouple, a widely used type of temperature sensor
* "To contain", on laboratory glassware
* Tonnes of carbon (tC)</sup>

In computers:
* .tc, the Internet country code top-level domain (ccTLD) for Turks and Caicos Islands
* IEEE Transactions on Computers, a computer science journal
* TopCoder, company which administers contests in computer programming
* Total conversion, a game modification that completely changes the games content
* TrueCrypt, free open-source disk encryption software
* Trusted Computing a scheme for adding additional controls on what computers may or may not do into hardware or software
* Turbo C, software development program by Borland

In entertainment:
* T.C. as per Theodore Calvin, a character from Magnum, P.I., played by actor Roger E. Mosley
* TC Luoma an American magazine editor
* TC Music, an independent record label in New York
* TC Smith, an American singer, for TCR
* Tevin Campbell, musician
* The Committee, a celebrity and Hollywood organization.
* Tom Constanten, an American musician from the Grateful Dead
* Tom Cruise, an American actor
* Top Cat, a cartoon character
* TV Champion, a Japanese Super Game Boy video game
* , a PC game In geography:
* The Republic of Turkey, from the Turkish name, "Türkiye Cumhuriyeti"
* Traverse City Self Proclaimed "Cherry Capital of the World"
* Transport Canada a Canadian federal government department
* Trinity Cross, the highest national award in Trinidad and Tobago
* Turks and Caicos Islands
* Twin cities, often specifically the Minneapolis-St. Paul region

In textiles:
* Thread count

In transportation:
* Air Tanzania, IATA code
* TC, a Mazda piston engine
* TC by Maserati, an automobile sold by Chrysler from 1989-1991
* TC 2000, a series of races for touring cars which is held each year in Argentina
* Turismo Carretera, a popular stock car category in Argentina
* Twincam, an alternative term for an overhead camshaft (OHC) engine
* Scion tC, a touring coupe made by Scion that's based on the Toyota Avensis
* Traffic collision, an automobile accident
* Traction control, an anti-slip automobile subsystem
* Turn coordinator, an aircraft instrument

In other uses:
* Teachers College, Columbia University, a graduate school of education in New York City
* Taco Cabana, a fast food Mexican restaurant.
* TC Bear, the mascot for the Minnesota Twins baseball team
* Telecine, a motion picture film transfer process identifier (usually abbreviated TK instead to avoid confusion with time code)
* Telecom Cambodia, Cambodia's principal telecom
* Teleconverter, the secondary lens mounted on SLRs between the camera and the photographic lens
* The Colony, Texas, a city in the Dallas-Fort Worth Metroplex
* Tierra Comunera, a Spanish political party
* Time code, used in video and audio production
* Total Communication a form of Sign Language
* Transcend Christ, an era designation in the Xenosaga game series
* Tropical cyclone, also known as a hurricane
* Ty Conklin, an NHL goaltender

T_c may refer to multiple meanings:
* Critical temperature
* Convective temperature