
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1879
1952-3
1903
1830 (original); 1967 (model)
1885
1902
1875
1898
1899
circa 1897
1898
1877-1897
1889
1880
circa 1900
1879-1896
1884-1900
1888
1880-1900
before 1889
1886
1890 - 1900
1875
1884
1901
1877
1900
1955; 1830
1884
1895
About 1890
1887-1903
1875-1890
1879
1876
1878
1896
1894
1872-1880
1895-1900
1893-4
1899
1890-1894
1899-1901
1934
1898
1900
1896
1879