In enterprise computing, somewhere between the era of punched-card computers and the rise of the personal computer, there was the heyday of the mainframe and the “dumb terminal”—a keyboard and a monochrome monitor with no graphics capability, no mouse, no speakers, no webcam, no USB anything. One mainframe computer could support a large number of simultaneous users who logged in via these dumb terminals; they neither knew nor cared where the actual computer was located.