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Unformatted text preview: s is purely role-based and may change dynamically as the role of a
Figure 20.9 summarizes and presents a relative comparison of different types of
computers based on some key features. Points to Remember
1. Traditionally, computers were classified by their size, processing speed and
cost. Based on these factors, computers were classified as microcomputers,
minicomputers, mainframes and supercomputers. However, with the rapidly
changing technology, this classification is no more relevant.
2. Today computers are classified based on their mode of use. According to
this classification scheme, computers are classified as notebook computers,
personal computers, workstations, mainframe systems, supercomputers, and
clients and servers.
3. Notebook computers are portable computers which are mainly meant for use
by people who need computing power wherever they go. They are small enough
to fit inside a briefcase, light enough to be easily carried around, and are designed
to operate with chargeable batteries so that they can be used even at places where
there is no power point available. They normally run MS-DOS or WINDOWS
operating system and are mostly used for word processing, spreadsheet computing,
data entry, preparing presentation materials, and making presentations.
A personal computer is a non-portable general-purpose computer that can
easily fit on a normal size office table and is generally designed to be used by one
person at a time. PCs are mainly used to meet the personal computing needs of
individuals either in their working places or at their homes. They are also used
both by children and adults for education and entertainment. They normally run
MS-DOS, MS-Windows, Windows-NT, Linux, or Unix operating system and
support multitasking, which eases user operation and saves lots of time when a
user has to switch between two or more applications while performing a job.
A workstation is a powerful desktop computer designed to meet the
computing needs of engineers, architects, and other professionals who need greater
processing power, larger storage, and better graphics disp...
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This document was uploaded on 04/07/2014.
- Spring '14