Use of early computers in statistical mechanics; the development of the Monte Carlo method and his role in the invention of molecular dynamics simulation; the people involved with the Monte Carlo method at Los Alamos and his own colleagues: Edward Teller, Marshall Rosenbluth, Nick Metropolis, Stan Frankel, John G. Kirkwood, Bill Wood; work at Lawrence Livermore National Laboratory; difficulties with acceptance of his work within the scientific community; computer simulation versus real experiments, past and present; brief account of his personal history.