Organizations
- TopCoder, a company which administers contests in computer programming
- TC Music, an independent record label in New York
- TC Electronic, a Danish manufacturer of fine studio equipment and guitar effects
- Transport Canada, a Canadian federal government department
- Teachers College, Columbia University, a graduate school of education in New York City
- Telecom Cambodia, a telecom company in Cambodia
- Tierra Comunera, a Spanish political party
- Taco Cabana, a fast food Mexican restaurant
- The Committee (improv group), a San Francisco based improvisational comedy group
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