SW, sw or s/w may stand for:
Companies Air Namibia, IATA airline code Sherwin-Williams, an American paint company Sierra Wireless, Inc., TSX Silk Way Airlines, an Azerbaijani private cargo airline Slimming World, a weight loss company Smith & Wesson, S&W, a firearms manufacturer Southern Winds Airlines, a defunct Argentine airline Southwestern Company, a publishing company designed for college students
Geography Southwest, one of the four intercardinal directions Sweden (FIPS country code SW) SW postcode area, southwest London, England Schweinfurt, Bavaria, Germany, vehicle registration code Swietochlowice, Silesian Voivodeship, Poland, vehicle registration code
Occupations Steelworker (US Navy), an occupational rating Enlisted Surface Warfare Specialist, a US Navy occupational rating Sex worker
Science and technology Computing and telecommunications Shortwave radio band, 1.6–30 MHz Shortwave radiation, in visible and near visible bands Smith–Waterman algorithm, algorithm for performing local sequence alignment , Store Word, an RISC-V instruction
Other uses in science and technology Sport wagon or crossover, an automobile configuration Station wagon, a designation of some manufacturers Olof Swartz, botanist, abbreviated Sw. in botanical citations Band 3, a protein Unified Soil Classification System symbol for well graded sand
Other uses Sw., taxonomic author abbreviation for Olof Swartz (1760–1818), Swedish botanist and taxonomist Swahili language (ISO 639 alpha-2 code "sw") Star Wars, a science fiction media franchise "S.W", a song by Blonde Redhead from their 2007 album 23 Social work Sawah Besar railway station, a railway station in Jakarta, Indonesia