SWD may refer to: Dragunov sniper rifle (Polish designation SWD) (Subject Headings Authority File), a German indexing system Serial Wire Debug, an electrical interface Shift work sleep disorder (also known as Shift Work Disorder) Shortwave diathermy Southern Winds Airlines, ICAO code Southwest DeKalb High School, Georgia, US Sonic Wave Discs, Swervedriver band record label Spanish Water Dog Spotted wing drosophila, a fruit fly Stockton, Whatley, Davin & Co., financial company, Jacksonville, Florida, US