
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1830 (original); 1967 (model)
1885
1902
1875
1865-1866
1898
1899
circa 1861
1862
circa 1897
1898
1877-1897
1889
1880
1869
circa 1900
1884-1900
1879-1896
1888
1880-1900
before 1889
1870-1888
1886
1890 - 1900
1865
1875
1884
1901
1877
1900
1884
1895
1870-1880
1867
1867
About 1890
1875-1890
1861
1861
1876
1878
1896
1872-1880
1893-4
1899-1901
1934