
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
1862
circa 1846
1870
circa 1871
1872
1850-1860
1858
1853-1857
1847-1848
1862
1850-1870
1850
1860
1870
1870
1855
circa 1850s
circa 1848
1846
1849
1873
1877
1860
1850-1859
1848
1858
1875
1850
circa 1860
1863-1865
1856
1861
1861
1850-1870
1893-4
1934
2000-100 BCE
1861-1866
1864
1870s
1857-1870
1871
1855-1870
1851
1850-1859
1853
1854
circa 1854