
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
1878-1879
1879
1870
1872
1879
1860
1879
1865
1882
1867-1868
1875
1877
1870
1866-1870
1878
1870-1875
1860
circa 1868
1879
1862
circa 1871
circa 1860
circa 1861
1870-1880
1865
1862
1875
1867
1867
1863-1865
1870-1880
1955; 1830
1871
circa 1861
circa 1880
1861
1861
1879
1876
1878
1872-1880
1867
1865-1866
1865
1870-1881
1893-4
1866
1934