Final answer:
A minicomputer is a computer that supports many users and is smaller and cheaper than a mainframe. A microcomputer is a computer built using a microprocessor integrated onto a single chip.
Step-by-step explanation:
Minicomputer: A minicomputer is a computer that supports many users at once and has a lower computing capacity than a mainframe. Minicomputers were small and cheap compared to mainframe computers and were made by companies like Digital Equipment Corporation, Data General, and Apollo Computer. However, minicomputers have largely been supplanted by powerful personal computers.
Microcomputer: A microcomputer is a computer that is built using a microprocessor, which is an entire computer processor integrated onto a single chip. Microprocessors were invented in the 1970s and made computers cheap enough for hobbyists to build their own. Companies like Apple and IBM played a major role in popularizing microcomputers and making them accessible to the average consumer.