RST
- Intel Rapid Storage Technology
- Nancy Grace Roman Space Telescope
- R-S-T system
- RST model
- Rapid strep test
- Reading span task
- Registered Safe Technician
- Reinforcement sensitivity theory
- Renault Sport Technologies
- Retail sales tax
- Reverse semantic traceability
- Rhetorical structure theory
- Rhodesian Selection Trust
- Rochester International Airport
- Romance Standard Time
- Rosetta Stone (company)
- Royal Shakespeare Theatre
- Royal Society of Tasmania
- Transmission Control Protocol