
Difference Engine No. 1
circa 1832
circa 1832
1838
1835
1837-1840
1840
1834
1832
1842
1893-4
1934
1840
2000-100 BCE
1842
1842
1837
1837
circa 1840
1837
1840
1834
1834
1610; 1923
1837
1843
1955; 1830
1835
1837
1841
1838
1837
1863-7
1833
1836
1842
1837
1839
1838
1841
1839
1838
1839
1839
1990-96
1842
1841
1832
1839
1772 (original); 1919 (model)
1839
1801-1840 (original); 1901 (model)