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