TCM

TCM is a three-letter acronym that may refer to:

;Places:
* The Computer Museum, Boston
* The Contemporary Museum, a contemporary art museum in Honolulu, Hawaii

;Arts and sciences:
* Theory of Condensed Matter group, a theoretical physics research group in the Cavendish Laboratory at the University of Cambridge
* Tianjin Conservatory of Music
* Traditional Chinese medicine, a range of traditional medical practices used in China that developed over several thousand years
* Trichloromethane or chloroform, a solvent and former anaesthetic
* Trinity College of Music, a leading music conservatory, based in Greenwich, London, United Kingdom.

;Broadcasting:
* Turner Classic Movies, a US cable TV channel owned by Time Warner which primarily features classic MGM, RKO and Warner Bros. films, which has spinoffs in other countries
** Turner Classic Movies (Asia)
** Turner Classic Movies (UK)
** TCM 2, a sister channel to the above UK channel

;Chemistry:
* Tetrachloromethane, an organic compound also known as Carbon Tetrachloride

;Companies:
* Teledyne Continental Motors, an American engine manufacturing company
* Transportas Companhia de Macau, a bus company in Macau

;Computing:
* "Tightly-coupled Memory", memory which resides directly on the processor of a computer; see Multiprocessing
* Toolkit for Conceptual Modeling, a collection of software tools to present specifications of software systems in the form of diagrams, tables, trees, and the like
* Total Commander, a shareware file manager for Microsoft Windows
* Trellis coded modulation, a signal modulation scheme for telecommunications
* Trusted Computing Module, a microprocessor that implements the concept of Trusted Computing

;Popular culture:
* The Corporate Machine, a 2001 personal computer game from Stardock
* The Crystal Method, an electronic music group
* The Texas Chain Saw Massacre, a 1974 horror movie remade in 2003
* Total Club Manager, football management series of video games from Bright Future (in older releases EA sports)

;Sports:
* Toronto Canada Moose, a Tier II junior 'A' ice hockey team based out of Thornhill, Ontario, Canada
* Twin Cities Marathon, an annual marathon in the Minneapolis-St. Paul area