A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor. The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (PCB). Microcomputers became popular in the 1970s and 1980s with the advent of increasingly powerful microprocessors. The predecessors to these computers, mainframes and minicomputers, were comparatively much larger and more expensive. Many microcomputers are also personal computers. An early use of the term "personal computer" in 1962 predates microprocessor-based designs. (See "Personal Computer: Computers at Companies" reference below). A "microcomputer" used as an embedded control system may have no human-readable input and output devices. "Personal computer" may be used generically or may denote an IBM PC compatible machine.

माइक्रो-कंप्यूटर एक ऐसा कंप्यूटर है जिसमें माइक्रो-प्रोसेसर इसके सेंट्रल प्रोसेसिंग यूनिट के रूप में होता है। मेनफ्रेम और मिनी कंप्यूटरों की तुलना में इनका आकार छोटा होता है। कई माइक्रो-कंप्यूटर पर्सनल कंप्यूटर भी होते हैं.