Computers are classified into three main types based on size and capacity: mainframe computers which are large and powerful used by many users at once in large organizations; minicomputers which are medium-sized used by many users at once in small organizations; and microcomputers or personal computers which are small and meant for individual use like desktops, laptops, and other mobile devices.

1. Types of Computer

2. Different Kinds of Computers
Depending on the size and capacity, computers are
classified into three types:
 Mainframe computers
 Minicomputers
 Microcomputers or Personal computers.

3. Mainframe Computers
 Large and powerful computers that are used by
many people (users) at the same time; typically
installed in large organizations.
 Located in a central place and accessed by users via
computer terminals or other computers placed at
different locations and connected to the mainframe
computer.
Supercomputers
 Extremely powerful mainframe computers used in
scientific and engineering applications.

4. Mainframe

6. Supercomputer

9. Minicomputers
 Minicomputers are medium sized computers -
between Mainframe computers and
Microcomputers
 Are also used by many users at the same time
 Used in small organizations.

10. Server

12. Microcomputer/Personal
Computers
 Small scale computers that fit on your desk;
meant to be used by one user (at a time)
Workstation
 A microcomputer with enhanced graphics and
communication capabilities

13. Desktop

15. PC

16. Workstation

18. Laptops

19. Netbook

20. Chromebook
A Chromebook is a mobile device
running Google Chrome OS. The
devices comprise a distinct class
of personal computer falling
between a pure cloud client and
traditional laptop.

21. PDA

24. Wearable Computer