1. The first to mass-Market a Microcomputer as a personal computer wasIBMSperry UNIVACData General CorporationRadio Shack

The first company to mass-market a microcomputer as a personal computer was Radio Shack. In 1977, Radio Shack introduced the TRS-80 (Tandy Radio Shack Model 80), which was one of the earliest mass-produced personal computers. The TRS-80 was notable for combining a microprocessor with a keyboard and a monitor, making it relatively accessible for individual users and small businesses.

While other companies, such as IBM and UNIVAC, contributed to the early development of computing technologies, it was Radio Shack's TRS-80 that captured significant consumer interest and helped to popularize the idea of personal computing among the general public. This move also laid groundwork for future developments in the personal computer market. The TRS-80 became known as the "Trash 80," a nickname that highlighted both its popularity and its limitations.