Microsoft Office Tutorials and References
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Types of Computers
Types of Computers
There are many types of computers, which are classified by their size, speed, capabilities,
and cost. Computers are categorized as personal computers, hand-held computers, main-
frames, and supercomputers.
Personal computers , originally called microcomputers , are the computers typically
used by a single user, for use in the home or office. Examples of personal computers are
shown in Figure 3.
Figure 3
Examples of personal computers
A desktop computer fits on a desk and runs on power
from an electrical wall outlet. The monitor can be a
flat panel monitor (like the one shown) or a CRT
monitor, which takes up more space on the desk,
but is less expensive.
A notebook computer is small and
lightweight, giving it the advantage of
portability. It can run on power supplied
by an electrical outlet, or it can run on
battery power.
A Tablet PC is a portable computer that has a screen on which the user can execute commands
and write with a stylus. The computer recognizes the handwriting and integrates it into the
program being used. On some models, the screen can be moved out of the way so that the
user can access an attached keyboard; on other models, you can attach a keyboard if you wish.
A personal computer is used for general computing tasks such as word processing,
working with photographs or graphics, e-mail, and Internet access. A personal computer
is available as a desktop computer , which is designed to sit compactly on a desk; as a
notebook computer (also referred to as a laptop computer ), which is designed for porta-
bility; or as a Tablet PC , which is also designed for portability, but includes the capability
of recognizing ordinary handwriting on the screen. Tablet PCs also include speech recog-
nition software. Personal computers cost between $500 and $3000, but the average com-
puter user spends $800 to $1300 when purchasing a personal computer. A notebook
 
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