
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1879
1885
1875
1884
1872
1889
1830 (original); 1967 (model)
1869
1870
1870-1888
1872
1886
circa 1885
1872-1880
1934
1879
1886
1882
1888
circa 1868
1875
1867-1868
1875
1884
before 1889
1867
1867
1872
before 1889
1888
1879
1876
1878
1867
1870-1881
1870-1877
1870-1880
1876
1872 (original); 1909 (model)
1875
1884
1870
1893-4
1880
2000-100 BCE
1875-1885
1870s
1877
1870-1880