Phillip's Economic Computer
1949
1949
1949
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1949
1950
1990-96
1950
1950
1938 and 1951
1949
1903 (original); 1982 (model)
2000-100 BCE
1950
4000-2001 BCE
1955; 1830
circa 1950
1950
circa 1950
1949
1949
1950
1949
circa 1950
1950
1950
1950
1950
1949
1949
1950
1980-1950
1949
1949
1949
1949
1950
1950
1950
circa 1950
1952-3
1950
1990-95
1949
1949
1949
circa 1950s
1960-1979
6000-5000BCE
1879 (1956)