The General Radio Company was incorporated in 1915, in Cambridge, Massachussets by Melville Eastham (1885-1964), and was famed for their development and manufacture of electronic instruments, test equipment, laboratory standards throughout the twentieth century. The General Radio Company History materials largely document the efforts to write a synthetic history of the General Radio Company in the late 1980s and early 1990s, supported by the IEEE History Center. While Joseph F. Keithley headed the project, it was conceived as a collaborative endeavor with various persons each writing a chapter on their topic of specialty. Additionally, there is a large binder labeled, “Company Data” containing alphabetically organized information about other firms involved in the manufacture and development of precision measuring instruments over the course of the twentieth century.