A microcomputer is a small computer built around a single microprocessor chip, designed for use by one person at a time. When microcomputers first appeared in the 1970s, they revolutionized computing by making it affordable and accessible to regular people, not just big companies or universities.

Before microcomputers, computers were enormous machines that filled entire rooms, cost millions of dollars, and required teams of specialists to operate. The invention of the microprocessor, a tiny chip containing all the circuits needed for a computer's brain, made it possible to build computers small enough to fit on a desk and cheap enough for families to buy.

Early microcomputers like the Apple II and Commodore 64 transformed homes and schools in the 1980s. Students could learn programming, families could play games, and small businesses could manage their finances. These machines had far less power than today's smartphones, but they opened the door to the digital age.

Today, the term microcomputer sounds old-fashioned because these machines became what we call personal computers or PCs. Your laptop, desktop computer, and even devices like the Raspberry Pi are all descendants of those first microcomputers.