David L. Morton examines the process of invention, innovation, and diffusion of communications technology, using the history of sound recording as the focus. Off the Record demonstrates how the history of both the hardware and the ways people used it is essential for understanding why any particular technology became a fixture in everyday life or faded into obscurity. Morton’s approach to the topic differs from most previous works, which have examined the technology’s social impact, but not the reasons for its existence. Recording culture in America emerged, Morton writes, not through the dictates of the technology itself but in complex ways that were contingent upon the actions of users.