the realization of those dreams didn’t only depend on the hardware of new technologies, such as the transistor. A mathematical guide for the system’s engineers, a blueprint for how to move data around with optimal efficiency, which was what Shannon offered, would be crucial, too. Shannon maintained that all communications systems could be thought of in the same way, regardless of whether they involved a lunchroom conversation, a postmarked letter, a phone call, or a radio or telephone transmission.