
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1879
circa 1861
1862
1885
1875
1884
1872
1889
1830 (original); 1967 (model)
1869
1870
1870-1888
1872
1886
circa 1885
1860
About 1890
1875-1890
1861
1861
1872-1880
1934
1879
1870-1890
1886
1882
1888
circa 1868
1890
1890
1875
circa 1860
1865
1867-1868
1875
1884
circa 1861
before 1889
1867
1867
1872
before 1889
1890
1888
1879
1876
1878
1867
1865-1866