J.J. O'Connor and E.F. Robertson George Dantzig Biographies of Mathematicians http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Dantzig_George.html , 2005, 1952, 1950s
"Dantzig became a research mathematician with the RAND Corporation in 1952 and during this period led the work on implementing linear programming on computers. Orchard-Hays writes . . . :-
"The systematic development of practical computing methods for linear programming began in 1952 at the RAND Corporation in Santa Monica, under the direction of George B Dantzig. The author worked intensively on this project there until late 1956, by which time great progress had been made on first-generation computers."