
Difference Engine No. 1
circa 1832
circa 1832
1838
1831
1839 (original); circa 1988 (replica)
1705-1737
1830 (original); 1967 (model)
1990-96
1829
1837
1837
1837
1821-1831
1955; 1830
1835
1834
1829
1832
1893-4
1838
1934
1837
1863-7
1821
1830
1829
1825
2000-100 BCE
1833
1835
1836
1837
1826
1838
1834
1834
1839
1837
1837
1831
1826
1820
1839
1825-1835
1820-1830
circa 1821-1825
1838
1839
1772 (original); 1919 (model)
1826
1839