The abbreviation RSD may refer to:
- Serbian dinar, ISO 4217 code for the currency of Serbia
- RSD S.A., an information governance software provider
- Really Simple Discovery, an XML format describing some features of a blog service
- Recreational Software Designs, the developer of the seminal DOS-Based game creation system Game-Maker
- Reflex Sympathetic Dystrophy see Complex regional pain syndrome
- Remote Sensing Data, see Remote sensing - often information gathered by satellites
- Retinal Scanning Display, see Virtual retinal display
- Repetitive Stress Disorder, an old name for repetitive strain injury
- Relative standard deviation in statistics ( rsd )
- Reichssicherheitsdienst (RSD) or Reich Security Service, personal bodyguards of Adolf Hitler
- RoadSide Delivery, a postal term used by Australia Post
- Robust Standard deviation, related to Standard deviation or Robust statistics
- Regulator of Sigma D, an anti-sigma factor against the major sigma factor (sigma70) in E. coli
- Record Store Day, an unofficial holiday celebrated by independent record stores in April.
- RSD-Gaskiya, or Social Democratic Rally, a political party of Niger
- Alias of Rob Smith, a British electronic musician
- Rubber Side Down, a cycling term meant to indicate keeping the wheels on the ground and not the other way around (i.e., don't crash).
Read more about RSD: Schools