classification W Ruth Graves Wakefield (1903–1977), U.S. – chocolate chip cookie Paul Walden (1863–1957), Latvia/Russia/Germany – Walden inversion, Ethylammonium nitrate (the first room temperature ionic liquid) Jimmy Wales (born 1966), together with Larry Sanger, U.S. – Wikipedia Adam Walker (1730–1821), UK – eidouranion Madam C.J. Walker (1867–1919), U.S. – beauty and hair products for African American women Barnes Wallis (1887–1979), UK – bouncing bomb Frederick Walton (c. 1834–1928), UK – Linoleum Maurice Ward (1933–2011), UK – Starlite Aldred Scott Warthin (1866–1931), together with Allen Chronister Starry (1890–1973), U.S. – Warthin–Starry stain (histology) Robert Watson-Watt (1892–1973), Scotland – microwave radar James Watt (1736–1819), Scotland – improved Steam engine Thomas Wedgwood (1771–1805), UK – first (not permanent) photograph Carl Auer von Welsbach (1858–1929), Austria – Gas mantle, ferrocerium Jonas Wenström (1855–1893), Sweden – three-phase electrical power George Westinghouse (1846–1914), U.S. – Air brake (rail) Charles Wheatstone (1802–1875), UK – concertina, stereoscope, microphone, Playfair cipher, pseudoscope, dynamo Richard T. Whitcomb (1921–2009), U.S. – Supercritical airfoil, Winglet Cornelius Whitehouse (1796–1883), UK – method of manufacturing tubes cheaply and accurately Eli Whitney (1765–1825), U.S. – the cotton gin Frank Whittle (1907–1996), UK – co-inventor of the jet engine Otto Wichterle (1913–1989), Czechoslovakia – soft contact lens Norman Wilkinson (1878–1971), UK – Dazzle camouflage Charles Thomson Rees Wilson (1869–1959), UK – Cloud chamber Paul Winchell (1922–2005), U.S. – the artificial heart Sergei Winogradsky (1856–1953), Russia / USSR – Winogradsky column for culturing microorganisms Niklaus Wirth (born 1934), Switzerland – Pascal (programming language) A. Baldwin Wood (1879–1956), U.S. – high volume pump Norman Joseph Woodland (1921–2012), together with Bernard Silver (1924–1963), U.S. – Barcode Granville Woods (1856–1910), U.S. – the Synchronous Multiplex Railway Telegraph Steve Wozniak (born 1950), U.S. – Apple I & II computers, early Macintosh concepts, CL 9 CORE universal remote and other devices and applications. James Homer Wright (1869–1928), U.S. – Wright's stain (histology) Wright brothers, Orville (1871–1948) and Wilbur (1867–1912) – U.S. – powered airplane Wu Yulu, Chinese farmer and inventor of home-made robots Adam Wybe (1584-1653), Dutch - inventor of the cable car on multiple supports Arthur Wynne (1871–1945), UK – creator of crossword puzzle X Yi Xing (683–727), China – Astronomical clock Y Pavel Yablochkov (1847–1894), Russia – Yablochkov candle (first commercially viable electric carbon arc lamp) Hidetsugu Yagi (1886–1976), together with Shintaro Uda (1896–1976), Japan – Yagi–Uda antenna Alexander Yakovlev (1906–1989), Russia – Yak-series aircraft, including Yakovlev Yak-40 (the first