A computer system consists of four major parts: hardware, software, users, and data. Hardware refers to the physical components of the computer like processors and monitors. Software includes the programmed instructions that tell the computer what tasks to perform. Users are the people who operate computers. Data comprises the individual facts and pieces of information that are processed by the computer system.

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CHAPTER 3
(Computer System)

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COMPUTER
• Is an electronic device
that processes data
converting it into
information that is useful
to people.
• Any computer –
regardless of its type is
controlled by
programmed instructions,
which give the machine a
purpose and tell it what to
do.

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EVOLUTION OF COMPUTERS

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THE COMPUTER SYSTEM
• A complete computer system is consist of
four major parts:
1. Hardware
2. Software
3. User/s
4. Data

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HARDWARE
• The physical devices that
make up the computer
are called hardware.
• Hardware is any part of
the computer you can
touch.
• It consist of
interconnected electronic
devices that you can use
to control the computer’s
operation, input and
output.

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COMPUTER HARDWARE

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COMPUTER SOFTWARE
• Is a set of instructions
that makes the
computer perform
tasks.
• In other words,
software tells the
computer what to do.

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SOFTWARE BRINGS THE MACHINE
TO LIFE
• When a computer uses a particular program,
it is said to be running or executing the
program.
• Most software falls into two major categories
1. SYSTEM SOFTWARE
2. APPLICATION SOFTWARE

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SYSTEM SOFTWARE
• 3 Types of System Software
 Operating System – tells the
computer how to use its components
 Network Operating System – allows
the computer to communicate and
share data across network.
 Utility – makes the computer easier
to use or to perform highly
specialized functions

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APPLICATION SOFTWARE
• Application software tells the computer how to
accomplish specific tasks, such as word processing
or drawing, for the user.
• Some of the major categories of these applications
include the following:
 Word Processing Software for creating text-based
documents, such as newsletters or brochures.
 Spreadsheets for creating numeric-based documents,
such as budgets or balance sheets.
 Database management software for building and
manipulating large sets of data.

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CONTINUATION:
 Presentation Programs for creating and presenting
electronic slide shows
 Graphics Programs for designing illustrations or
manipulating photographs, movies and animation.
 Multi-media authoring applications for building digital
movies that incorporate sound, video, animation, and
interactive features.
 Entertainment and Education software packages, many of
which are interactive multi-media events
 Web Design Tools, Web Browsers and other internet
applications like news readers and e-mail programs
 And Lastly, the famous application software is the Games for
single or multi-player over a network or internet.

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COMPUTER SOFTWARE

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USER/S
• People are the computer
operators , also known
as the “Users”.
• No computer is totally
autonomous. Even if the
computer do its job
without a person sitting
in front of it, people still
design, build, program
and repair computer
systems.

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DATA
• Consist of individual
facts or bits of
information, which by
themselves may not
make much sense to a
person.
• The computer reads
and stores data of all
kinds – words,
numbers, images or
sounds.