
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1879
1903
1952-3
1830 (original); 1967 (model)
1885
circa 1897
1898
1902
1875
1898
1899
1877-1897
1889
1880
circa 1900
1884-1900
1879-1896
1888
1880-1900
before 1889
1901
1895
About 1890
1887-1903
1896
1896
1879
after 1903
1886
circa 1885
1892-1902
1902
1895
circa 1890
circa 1890
circa 1890
circa 1890
1896
1901
1897
1884
1875
1884
1877
1900
1955; 1830
before 1889
1885-1894
1872