The three-letter abbreviation RWS may stand for:
Businesses and organizations Ravens Wood School, Keston, London Borough of Bromley, England Rijkswaterstaat, Dutch water management agency Royal Watercolour Society, an English institution of painters working in watercolours Running with Scissors (company), a video game developer RWS Group, World's largest patent translation and localisation services provider
Sports RWS Bruxelles, a Belgian football club RWS Motorsport, an auto racing team based in Anger, Bavaria, Germany Rajadamnern World Series, a Muay Thai promotion located at Rajadamnern Stadium
Weapons 6.5 X 68 RWS, a cartridge produced by Rheinisch-Westfälische Sprengstoffwerke for the Mauser 98 bolt-action rifle Remote weapon station, a weapon mounting used on some armored military vehicles
Other uses Audi R8 RWS, the rear wheel series of Audi R8 sports car ISO 639:rws or Musi, a Malayan language RESTful web service, appears in Whois-RWS, a type of Internet number lookup service Resorts World Sentosa, an integrated resort in Singapore Romano–Ward syndrome, a condition that causes a disruption of the heart's normal rhythm Roulette wheel selection, a selection genetic operator in Genetic algorithms Rider–Waite-Smith tarot deck An abbreviation used for the children's book series, the Railway Series.