
Difference Engine No. 1
circa 1832
circa 1832
1838
1829
1835
1837-1840
1840
1834
1832
1830
1840
1837
1837
1835
1829
1837
1829
1837
1840
1826
1834
1834
1934
1893-4
1863-7
2000-100 BCE
1825-1835
1822-1840
circa 1840
1825
1837
1955; 1830
1837
1826
1831
1838
1833
1831
1836
1838
1839
1837
1839
1610; 1923
1826
1839
1839
1775-1799 (original); 1900-1907 (model)
circa 1840
1830
1840