
Phillip's Economic Computer
1949
1949
1949
1950-1952
1945
1942
1951
1940
1945
1948
1946
1943
1948
2000-100 BCE
1945
1947
1940
1942
1946
1941-1950
1940
1950
1951
circa 1950
1950
1948
1951
1940-1945
1950
1940-1949
1942
circa 1950
1950-1951
circa 1942
1952
1952
1952
1952
1951
1946-1948
1938 and 1951
1944-1945
1946
1940
1947
1948
1940
1950
1955; 1830
1951
1949