
Difference Engine No. 1
circa 1832
circa 1832
1801-1840 (original); 1901 (model)
1823
1838
circa 1846
1829
2000-100 BCE
1840
1842
1837
1833
1841
1842
1835
1834
1829
1834
1834
1845
1845
1838
1826
1845
1837
1826
1842
1836
1834-1844
1837
1840-1845
1839
1955; 1830
1825-1835
1837
1822-1840
1825
circa 1840
1839
1843
1846
1842
1837
1835
1837
1825
1832
1831
1831
1840
1841