Ramsey describes his early educational background, his transition from engineering to science, and his recruitment to the Radiation Laboratory. He recalls the errors and successes of the early planning committees at Rad Lab, and the laboratory's interactions with both private industry and the military. He recounts the various stages of design and the drastic improvements in microwave technology within his group at Rad Lab. He describes the transfer of technology between Britain and the United States and the information exchange that occurred within the Rad Lab itself, and his working relationship with many colleagues at Rad Lab and Los Alamos, particularly Oliphant, Rabi, and Oppenheimer. He also discusses the effect of Rad Lab on his later career at Fermilab, Brookhaven, and Harvard.