
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1879
1885
1875
1884
1872
1830 (original); 1967 (model)
1869
1870
1872
1886
circa 1885
1872-1880
1934
1879
1886
1882
1875
1875
1884
1872
1879
1876
1878
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
1879
1955; 1830
1873
1872
1880
1885
1878
1934
1875-1877
1872
circa 1880