
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1837
1822-1840
circa 1840
1955; 1830
1842
1842
1835
1837
1834
1829
1832
1826
1831
1842
1841
1893-4
1838
1934
1837
1863-7
1830
1829
1840
1825
2000-100 BCE
1833
1831
1835
1836
1837
1840
1842
1826
1838
1834
1834
1825-1835
1841
1839
1839
1837
1842
1841
1838