
Difference Engine No. 1
circa 1832
circa 1832
1815-1825
1820
1823
1821
1829
2000-100 BCE
1833
1835
1834
1829
1834
1834
1826
1826
1820
1955; 1830
1825-1835
1825
1821-1831
1835
1825
1832
1831
1815
1815
1815
1831
1820-1830
1893-4
1934
1863-7
1821
1830
1829
1814
1816
1829
1821
1826
1832
1830
1815
1824
1826
1831
1775-1799 (original); 1900-1907 (model)
1833
circa 1821-1825
1772 (original); 1919 (model)