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• Is an electronic device
that processes data
converting it into
information that is useful
• Any computer –
regardless of its type is
which give the machine a
purpose and tell it what to
THE COMPUTER SYSTEM
• A complete computer system is consist of
four major parts:
• The physical devices that
make up the computer
are called hardware.
• Hardware is any part of
the computer you can
• It consist of
devices that you can use
to control the computer’s
operation, input and
• Is a set of instructions
that makes the
• In other words,
software tells the
computer what to do.
SOFTWARE BRINGS THE MACHINE
• When a computer uses a particular program,
it is said to be running or executing the
• Most software falls into two major categories
1. SYSTEM SOFTWARE
2. APPLICATION 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
• 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.
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
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.
• 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
• Consist of individual
facts or bits of
information, which by
themselves may not
make much sense to a
• The computer reads
and stores data of all
kinds – words,
numbers, images or