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Prepared by:Rozana Diana Ahmad Rusli

What is Software? Software is a program which

consists of a set of instructions that tell the computer how to perform a specific operation

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CATEGORIES OF SOFTWARE

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System SoftwareWhat is system software?Programs that control or maintain operation of Programs that control or maintain operation of computercomputer

TYPE OF SYSTEM

SOFTWARE

Operating System

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Function of Operating SystemsWhat are the functions of an operating system?

administer security

start the computer

manage memory

monitor performance

control a network

provide a user interface manage programs

provide file management and other utilities

establish an Internet connection

schedule jobs and configure devices

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User interfacecommand-line interface Controls how you enter data and

instructions and how information displays on the monitor’s screen

With a command-line interface, a user types commands or presses special keys on the keyboard to enter data and instructions

MS-DOS – circa 1981 until today

Enable the user to avoid memorizing keyword. It Provide menus by given point in a form of text based menu

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Menu Driven interfaceUser interface

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graphical user interface (GUI)User interacts with menus and visual images

such as buttons and other graphical objects to issue commands

User interface

Type of Operating System

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Fast, reliable Windows operating system

Example Operating SystemsWindows XP

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Successor to Windows XP, containing a new interface and new / enhanced features

Example Operating SystemsWindows Vista

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Example Operating SystemsMac OS X

Available only for computers manufactured by Apple, Inc.

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Example Operating SystemsUNIX

Used by power users because of its flexibility & powerMost versions offer GUIAvailable for computers of all sizes

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Example Operating SystemsLinux

Red Hat provides a version of Linux called Red Hat EnterpriseLinux.

Novell offers a Linux version call Suse Linux

Popular,free,multitasking UNIX-type operating system

Open-source softwaree code is available to public

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Example Embedded Operating Systems

What is an embedded operating system?

Found on most mobile computers, PDAs, and other small devices Windows CE is scaled-down version

of Windows Windows Mobile for Pocket PC Palm OS for Palm Embedded Linux Blackberry OS Symbian OS

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Utility ProgramsWhat is a utility program?

System software that performs maintenance-type tasks

There are lots of utility programs

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Example Utility ProgramsWhat is a file manager? Performs functions such as

formatting, copying, renaming, deleting, and moving files

Image viewer displays the contents of a graphics file when you double click on it

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Example Utility ProgramsWhat is a personal firewall? Detects and protects a personal computer

from unauthorized intrusions Windows XP & Vista automatically enable

the built-in personal firewall upon installation

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Example Utility ProgramsWhat is a disk defragmenter?

fragmented disk

disk after defragmentation process

Reorganizes files and unused space on your hard disk so programs run faster

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Example Utility Programs

What is a backup utility? Copies selected files or your entire hard

disk onto another storage medium A restore program reverses the backup

process and returns backed up files to their original form

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Example Utility ProgramsWhat is an antivirus program? Identifies and removes viruses in

memory, storage media, and incoming files

Must be updated frequently

McAfee Symantec/Norton

Free Versions:AVGAVAST

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Example Utility ProgramsWhat is Spyware? Program placed on a computer without the

user’s knowledge that secretly collects information about the user

A spyware remover is a program that detects and deletes spyware, adware, and similar programs

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Example Utility ProgramsWhat is a file compression utility? Shrinks size of files to free up room and

improve performance Compressed files are sometimes called

zipped files Two popular utilities: PKZIP and WinZip Windows XP and Vista can create folders

with compressed files within it Outlook email client can compress attached

images