
Difference Engine No. 1
circa 1832
circa 1832
1820
1821
1831
1830 (original); 1967 (model)
1775-1799 (original); 1900-1907 (model)
1829
1820
1821-1831
1955; 1830
1826
1863-7
1829
1833
1831
1829
1832
1831
1893-4
1821
1830
1825
2000-100 BCE
1820-1830
1826
circa 1821-1825
1832
1826
1990-96
1823
1824
1830
1830
1826
1824
1833
1823-1825
1822
1829
1705-1737
1828
1870-1877
1820
1823
1825
1830
1821
4000-2001 BCE
1829
1821