SSR
- Electronics: Solid-State Relay, an electronic switch without moving parts.
- Aviation: Secondary Surveillance Radar, used for air traffic control.
- Web Development: Server-Side Rendering, rendering web pages on the server.
- Biology: Simple Sequence Repeat, a DNA sequence pattern.
- Education: Sustained Silent Reading, a quiet reading practice.
- Job Titles: Semi-Senior, indicating a level between Junior and Senior roles, or Senior Secondary Recruit in the Indian Navy.
- Statistics: Sum of Squared Residuals, a measure in regression analysis.
- Historical political entity: Soviet Socialist Republic.
- Computer Graphics: Screen Space Reflections.
- International Relations: Security Sector Reform.