
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1879
1870
1885
1862
1872
1860
1839 (original); circa 1988 (replica)
1884
1874
1705-1737
1889
1830 (original); 1967 (model)
1872
1886
1860
1870-1880
About 1890
1861
1861
1879
1870-1890
circa 1860
1886
circa 1885
circa 1861
1880-1889
1878-1890
1878-1890
1878-1890
1878-1890
1890-1894
1865
1866
1890-1894
1870s
1878-1890
1878-1890
1889
1865
1865
1867-1868
1875
1884
1877
1955; 1830
1875
circa 1861
1875
before 1889