Centuries: 19th century - 20th century - 21st century
Decades: 1850s 1860s 1870s 1880s 1890s - 1900s - 1910s 1920s 1930s 1940s 1950s
Years: 1899 1900 1901 1902 1903 - 1904 - 1905 1906 1907 1908 1909
Art, Culture & Fashion
... Developed by researchers at IBM in the 80's. Each variable is only defined once, a redefinition of a variable is considered to be a new variable (version). Th ...
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