Types of computers

Microcomputers
The most common type of computer. Microcomputers are sometimes called personal computers or PC. The first PC is considered to be the Kenbak-1 released in 1971 by Kenbak Corporation. There are a wide variety of microcomputer but two common types are desktop computers and portables

Mainframe and mini computers
Mainframes are large, powerful and expensive computers that are operated by a team of professionals and are designed to be used by many people at the same time. The most powerful mainframes are sometimes called supercomputers
Minicomputers are really cut-down mainframes and are no longer very common.Since the late 1980s, minicomputers have been completely replaced by personal computers