
Difference Engine No. 1
circa 1832
circa 1832
1835
1838
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
1830
1829
1837
1837
1837
1955; 1830
1835
1837
1834
1829
1832
1831
1893-4
1838
1934
1837
1863-7
1830
1829
2000-100 BCE
1833
1831
1836
1837
1837
1839
1838
1834
1834
1839
1830
1831
1833
1838
1832
1839
1772 (original); 1919 (model)
1839
1839
1839
1990-96
1830
1830-1835
1829
1829