
Difference Engine No. 1
circa 1832
circa 1832
1829
1668; 1924
1825-1835
1835
1829
1838
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1840
1836
2000-100 BCE
1840
1837
1837
1833
1837
1825
circa 1840
1839
1837
1839
1955; 1830
1826
1837
1838
1835
1837
1825
1834
1832
1834
1834
1826
1831
1831
1840
1893-4
1838
1934
1837
1863-7
1830
1829
1840
1829
1838
1826
1826
1837-1840