TDR may refer to:
Science and technology
- Interstate TDR, WWII US Navy aerial drone
- Telecommunications for Disaster Relief, a proposed standard
- Time-delay relay, a relay that opens an closes with a certain timing
- Time-domain reflectometry, a measuring method
- Time-domain reflectometer, an instrument used for time-domain reflectometry
- Throttleable ducted rocket, a type of air-augmented rocket motor
Medicine
- Radiolabeled thymidine (TdR)
- Totally drug-resistant, the ability of a microbe to resist the effects of all known drugs
Groups and organizations
- The Designers Republic, a former graphic design studio in England
- Tony D'Alberto Racing, an Australian V8 Supercar motor racing team
Other
- TDR (journal), The Drama Review, an academic journal
- Tokyo Disney Resort, Japan
- Timeout Detection and Recovery, a feature in the Windows operating system that allows it to recover from video driver errors
- Transferable development rights, a method for controlling land use
- Troubled debt restructuring, a debt restructuring process
- Total dependency ratio, ratio of dependents to workers
- Total DramaRama, an animated series on Cartoon Network