
Difference Engine No. 1
circa 1832
circa 1832
1668; 1924
1835
1838
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1840
1840
1837
1837
circa 1840
1837
1839
1955; 1830
1836
1833
1837
1839
1837
1837
1834
1832
1834
1834
1831
1934
1837
1830
1840
1835
1831
1840
2000-100 BCE
1893-4
1838
1863-7
1838
1837-1840
1839
1772 (original); 1919 (model)
1839
1839
1990-96
1832
1830
1838
1832
1839
1835-1840
1870-1877