
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
circa 1832
1878-1879
1879
1853-1857
1870
1846
1872
1838
1850
1835
1879
1838
circa 1846
1851
1845-1855
1847-1848
1831-1870
1860
1836
1850-1856
1850-1859
1845
1851
1879
1850-1859
1853
1865
1867-1868
1849
1855
1846-1859
1854
1840
1875
1842
1853
1850
1837
1837
1852
1877
1870
1834-1844
1837
1866-1870
circa 1854
1850
1878