RTD
- Corner retirement
- RT Documentary
- RTD info
- Radio Tanzania Dar es Salaam
- Radio Television of Djibouti
- Ready to drink
- Real-time data
- Regional Transportation District
- Research and development
- Residence time distribution
- Resistance temperature detector
- Resonant-tunneling diode
- Retired
- Richmond Times-Dispatch
- Right to Die
- Round-trip delay time
- Russell T Davies
- San Joaquin Regional Transit District
- Southern California Rapid Transit District