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IBM Archives > Exhibits > History of IBM > 1880s >  1885     Introduction Timeline   1880s   1890s   1900s   1910s   1920s   1930s   1940s   1950s   1960s   1970s   1980s 1990s   2000s   1880   1881   1882   1883   1885   1886   1887   1888   1889 Julius E. Pitrap of Gallipolis, Ohio, patents his first computing scale. (Pitrap's patents are later acquired by a forerunner of IBM.)