
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1858
1830 (original); 1967 (model)
1846
1885
circa 1861
1862
1865-1866
1860
1875
1858
1889
1880
1869
1849
1858
1853-1857
1847-1848
1888
1870-1888
before 1889
1854
1860
1870-1880
About 1890
1856
1861
1861
1879
1870-1890
1857-1870
1886
circa 1885
1850
1848
1858
1850
circa 1890
circa 1890
circa 1890
circa 1890
circa 1860
1884
1853
1865
1867-1868
1849