
Difference Engine No. 1
circa 1832
circa 1832
1834-1836
1837
1837
1834
1832
1837
1834
1834
1837
1830
1835
1837
1837
1831
1955; 1830
1934
1837
1835
1893-4
1863-7
2000-100 BCE
1833
1831
1836
1830
1831
1830
1930 (replica); 1834 (original)
1830
1990-96
1833
1832
1830 (original); 1967 (model)
1832
1772 (original); 1919 (model)
1870-1877
1705-1737
1775-1799 (original); 1900-1907 (model)
1837
1835
1835
1837
4000-2001 BCE
1830-1835
1936
300 BCE; 1905-1915
1835
1833
1834