TCB
- Barycentric Coordinate Time
- Federal Communications Commission
- Kochanek–Bartels spline
- Ordnance Survey
- TCB (TV program)
- TCB (album)
- TCB (band)
- TCB Band
- TCB-2
- TCF Financial Corporation
- Taiwan Cooperative Bank
- Taking Care of Business (disambiguation)
- Task Control Block
- Telephone Company Building (disambiguation)
- Temenos Group
- The Conference Board
- Thread control block
- Touring Club Belgium
- Transmission Control Protocol
- Transportes Charter do Brasil
- Treasure Cay Airport
- Trichlorobenzene
- Trusted computing base