It has its own CPU (Central Processing Unit), monitor and keyboard. It’s used as a PC at home or as a workstation for a group work.  It’s not a portable device. It is designed to be placed on a desk

The most powerful type of computer. It can process and store large amounts of data. It supports multiple users at the same time and can support more simultaneous processes than a PC. The central system is large server connected to hundreds of terminals over a network. It’s normally used for large-scale computing purposes in banks, big companies and universities.

It is a lightweight computer that you can transport easily. It can work as fast as desktop PC, with similar processors, memory capacity, and disk drives, but it is portable and has a smaller screen. Instead of mouse, it has a touchpad built into the keyboard – a sensitive pad that you can touch to move the pointer on the screen.

It’s a tiny computer which can be held in one hand. The term refers to a wide variety of hand-held devices, palmtops and pocket PC. For input, you can type at a small keyboard or use a stylus- a special pen used with a touch screen to select items, draw pictures, etc.

Portable personal computer with a touch screen interface. Handwriting can be recognized and converted into edible form. You can type at the detached keyboard or use voice recognition.