
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1830 (original); 1967 (model)
1885
1875
1889
1880
1869
1879-1896
1888
1870-1888
before 1889
1886
1875
1884
1877
1955; 1830
1884
1895
1870-1880
1875
1867
1867
About 1890
1875-1890
1879
1876
1878
1896
1894
1872-1880
1893-4
1890-1894
1934
1896
1879
1880
2000-100 BCE
1870-1890
1870-1880
1875-1885
1885-1895
1880-1890
1875
1892
1886
1884
1882