and purpose-designed bomber (Ilya Muromets), helicopter, Sikorsky-series helicopters Bernard Silver (1924–1963), together with Norman Joseph Woodland (1921–2012), U.S. – Barcode Kia Silverbrook (born 1958), Australia – Memjet printer, world's most prolific inventor Luther Simjian (1905–1997), Armenia/U.S. - Automated teller machine (ATM) Vladimir Simonov (1935–2020), Russia – APS Underwater Assault Rifle, SPP-1 underwater pistol Charles Simonyi (born 1948), Hungary – Hungarian notation Ibn Sina (Avicenna) (980–1037), Persia/Iran – steam distillation, essential oil, pharmacopoeia, clinical pharmacology, clinical trial, randomized controlled trial, quarantine, cancer surgery, cancer therapy, pharmacotherapy, phytotherapy, Hindiba, Taxus baccata L, calcium channel blocker Clive Sinclair (1940-2021), U.K. - Sinclair C5, ZX Spectrum and A-bike Isaac Singer (1811–1875), U.S. – sewing machine B. F. Skinner (1904–1990), U.S. – Operant conditioning chamber Nikolay Slavyanov (1854–1897), Russia – shielded metal arc welding Alexander Smakula (1900–1983), Ukraine/Russia/U.S. – anti-reflective coating Michael Smith (1932–2000), U.S. – Site-directed mutagenesis (molecular biology) Oliver Smithies (1925–2017), together with Sir Martin John Evans (born 1941), and Mario Ramberg Capecchi (born 1937), U.S. – Knockout mouse, Gene targeting Yefim Smolin, Russia – table-glass (stakan granyonyi) Friedrich Soennecken (1848–1919), Germany – Ring binder, Hole punch Su Song (1020–1101), China – first chain drive Marin Soljačić (born 1974), Croatia – Resonant inductive coupling Edwin Southern (born 1938), U.S. – Southern blot (molecular biology) Alfred P. Southwick (1826–1898), U.S. – Electric chair Igor Spassky (born 1926), Russia – Sea Launch platform Percy Spencer (1894–1970), U.S. – microwave oven Elmer Ambrose Sperry (1860–1930), U.S. – gyroscope-guided automatic pilot Lyman Spitzer (1914–1997), U.S. – Stellarator (physics) Frank J. Sprague (1857-1934), father of electric traction, electric elevator improvements and electric multiple unit trains. Bhargav Sri Prakash (born 1977), India/U.S. – Digital vaccines, learnification platform at FriendsLearn, virtual reality system, electromagnetic collision avoidance system, OBD based in-vehicle powertrain performance measurement, rate-based driver controls for drive by wire systems Ladislas Starevich (1882–1965), Russia/France – puppet animation, live-action/animated film Gary Starkweather (1938–2019), U.S. – laser printer, color management John Kemp Starley (1855-1901), U.K. - safety bicycle Betsey Ann Stearns (1830-1914), U.S. – garment cutting diagram and system Boris Stechkin (1891–1969), Russia – co-developer of Sikorsky Ilya Muromets and Tsar Tank, developer of Soviet heat and aircraft engines George Stephenson (1781–1848), UK – steam railway Simon Stevin (1548–1620), Netherlands – land yacht Andreas Stihl (1896–1973), Switzerland/Germany – Electric chain saw Reverend Dr Robert Stirling (1790–1878), Scotland – Stirling engine Aurel Stodola (1859–1942), Slovakia – gas turbines Aleksandr Stoletov (1839–1896), Russia