Radio Shack Personal Computer, Model TRS-80 II, 1979-1980

Introduced in 1979 by popular electronics company Tandy RadioShack, this microcomputer was marketed as a powerful, multitasking business machine. Big and small businesses alike established a culture of personal computers in the workplace. In opposition to previous generations who built and programmed their own machines, TRS users were discouraged by the company to tamper with its proprietary hardware and software.