
Difference Engine No. 1
circa 1832
circa 1832
1829
1820
1821-1831
1808
1809
circa 1810
1829
1832
1812
1826
1831
1807
1815
1815
1955; 1830
1826
1808
1807
1810-1817
1893-4
1808
1807
1821
1812
1830
1807
1812
circa 1808
1807
1814
1816
1825
1815-1825
2000-100 BCE
1813
1833
1820-1830
1831
1815
1863-7
1829
1810-1830
1829
circa 1821-1825
1821
1821
1832
1772 (original); 1919 (model)
1826