
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1969-1970
1980-1990
1992-1994
1903
1801-1830
1862
1919
1920-1925
1934
1900-1910
1998-2002
1988
1905
1897-1898
1923
1885
1952-3
1999-2003
1953
circa 1972
1966-1970
1925-1958
2012
1951
1980
circa 2016
1947-2003
(1962); 1982
1980-2000
1880-1920
1900-1910
1870
1940
1950
1906-1959
1900-1910
circa 1956
1874
1949
1889
1991-2000
1847-1848
circa 1842
1960-1970
1853-1857
1968
2000-2002