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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