
Difference Engine No. 1
circa 1832
circa 1832
1838
1831
1815-1825
1705-1737
1830 (original); 1967 (model)
1990-96
1829
1837
1837
1837
1821-1831
1955; 1830
1807
1808
1809
1835
1834
1829
1832
1807
1815
1815
1893-4
1838
1934
1837
1863-7
1808
1807
1821
1812
1830
1807
1812
circa 1808
1829
1807
1814
1816
1825
2000-100 BCE
1813
1833
1835
1836
1837
1826
1838
1834