Hill's connections with the Massachusetts Institute of Technology Radiation Laboratory during World War II. Specific topics are Hill's early education; the military's relationship with the Rad Lab; postwar importance of the Office of Naval Research; the Rad Lab as instrument-maker rather than physics laboratory; postwar connections of Rad Lab with Charles S. Draper; Rad Lab-Los Alamos comparison; relations with Raytheon Corporation; effect of Rad Lab on Hill's career; Lee DuBridge and the Steering Committee. In the postwar era, Hill briefly discusses his work at the Charles Stark Draper Laboratories and his connections with the transistor.