RSS (disambiguation)
- GS1 DataBar
- IBM Retail Store Solutions
- RS (disambiguation)
- RS2 (disambiguation)
- RSS
- Radio Security Service
- Radio Service Software
- Radio science subsystem
- Raqqa Is Being Slaughtered Silently
- Rashtriya Swayamsevak Sangh
- Reactive sulfur species
- Receive-side scaling
- Received signal strength indication
- Recombination signal sequences
- Red Sea (state)
- Red Swastika School
- Red Swastika Society
- Regional Security System
- Regional spatial strategy
- Remote Sensing Systems
- Republic of Singapore Navy
- Resident set size
- Residual sum of squares
- Reusable spaceship
- Riverside Secondary School (Windsor, Ontario)
- Rockdale, Sandow and Southern Railroad
- Rotary steerable system
- Rotating Service Structure
- Rowan-Salisbury Schools
- Royal Society of Sculptors
- Royal Statistical Society
- Royal Stuart Society
- Russell-Silver syndrome