
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
1878-1879
1879
1872
1860
1870
1862
circa 1871
1875
1880
1858
1879
1775-1799 (original); 1900-1907 (model)
1871
1830 (original); 1967 (model)
1870
1856
1879
1857-1870
1858
2000-100 BCE
circa 1868
1870s
1875
1934
1880
circa 1860
1866-1870
1879
1855
1862
1870-1880
1860
1863-1865
1870-1880
circa 1861
1860
1879
1861
1867-1868
1861
1862
1865
1875
1877
1955; 1830
1878
1855-1870
1870-1875