
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1830 (original); 1967 (model)
1885
1875
1889
1880
1869
1888
before 1889
1870-1888
1870-1880
About 1890
1879
1886
circa 1885
circa 1890
circa 1890
circa 1890
circa 1890
2000-100 BCE
1875-1885
1875
1892
1884
1882
1870
1888
1890
1890
1889
1870s
1886
1875
1875
1884
1877
1875-1890
1876
1878
1872-1880
1893-4
1934
1892
1880
1884
1955; 1830
before 1889