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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