TDR
- Interstate TDR
- Relay
- TDR (journal)
- Telecommunications for Disaster Relief
- The Designers Republic
- Thymidine
- Time-domain reflectometer
- Time-domain reflectometry
- Timeout Detection and Recovery
- Tokyo Disney Resort
- Tony D'Alberto Racing
- Total DramaRama
- Totally drug-resistant
- Transferable development rights
- Troubled debt restructuring