The TRS-80 Model I arrived in a box with a keyboard, a Zilog Z80 microprocessor, and four kilobytes of memory. It connected to a black-and-white television and stored data on a cassette tape recorder. Tandy sold it exclusively through its RadioShack stores, a network of over 7,000 locations that suddenly made owning a computer as accessible as buying a transistor radio. The company projected modest sales of 3,000 units in its first year. It sold 10,000 in the first month.
This event mattered because it commercialized and normalized the personal computer. Before the TRS-80, building a microcomputer required soldering kits and technical manuals. Tandy packaged the technology as a consumer appliance. The price point, equivalent to about $3,000 today, was still significant but within reach for small businesses, schools, and determined individuals. It created a new market segment overnight.
A common misunderstanding is that the Apple II, released months earlier, immediately dominated. The TRS-80, nicknamed the "Trash-80" by rivals, outsold all its competitors combined for several years. Its success was not in superior engineering but in distribution and simplicity. RadioShack provided a place to see, touch, and awkwardly type on the machine. The ecosystem of software and magazines that grew around it, often typed in laboriously from printed code listings, taught a generation the basics of programming.
The lasting impact was demographic. The TRS-80 placed computing power in the hands of people who were not engineers or Silicon Valley enthusiasts. It became the workhorse for early small business accounting, classroom instruction, and bedroom game development. Its commercial success proved a mass market existed, forcing IBM and others to accelerate their own plans. The beige plastic box with the chiclet keyboard made the digital future a retail product.