
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1846
1858
1830 (original); 1967 (model)
1885
1875
1865-1866
circa 1861
1862
1889
1858
1860
1880
1869
1845-1855
circa 1842
1858
1853-1857
1849
1847-1848
1888
before 1889
1870-1888
1886
1853
1865
1849
1846-1859
1854
1875
1884
1837
1877
1860
1842
1846
1884
1870-1880
1842
1847
1845-1855
1845
1867
1867
About 1890
1842
1856