Mathematics: Root-sum-square
Technology: Rich Site Summary, RDF Site Summary, Radio Service Software
Science: Residual sum of squares
Medicine: recombination signal sequence, repetitive stress syndrome, Russel-Silver syndrome
Political Organizations: Rashtriya Swayamsevak Sangh Society: Regional Spatial Strategy, Regional Security System, Royal Statistical SocietySchool: Red Swastika School (Singapore), Riverside Secondary School (Windsor, Ontario, Canada)
Met dank aan: Wikipedia