
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1846
1858
1830 (original); 1967 (model)
1885
1862
1875
1865-1866
circa 1861
1858
1860
1889
1880
1869
1845-1855
circa 1842
1858
1853-1857
1849
1847-1848
1888
1870-1888
before 1889
1886
1853
1865
1849
1846-1859
1854
1875
1884
1852
1877
1860
1955; 1830
1842
1846
1884
1870-1880
1842
1848
1858
1875
1850
circa 1861
1847
1845-1855