A very large and expensive computer capable of supporting hundreds, or even thousands, of users simultaneously.

A midsized computer. In size and power, minicomputers lie between workstations and mainframes.

Desktop Computer: a personal or micro-mini computer sufficient to fit on a desk.

• Laptop Computer: a portable computer complete with an integrated screen and keyboard. It is generally smaller in size than a desktop computer and larger than a notebook computer.

is a special computer designed for technical or scientific applications. Intended primarily to be used by one person at a time, they are commonly connected to a local area network and run multi-user operating systems.