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Amr Chap 08 Operating Systems & Utility Programs
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Amr Chap 08 Operating Systems & Utility Programs


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  • 1. Operating Systems & Utility ProgramsChapter 8
    By Amr Aborig.
  • 2. What is System Software?
    System software consists of the programs that control or maintain the operations of the computer and its devices.
    Two types of system software .
    Operating systems
    Utility programs.
    An operating system (OS)is a set of programs containing instructions that work together to coordinate all the activities among computer hardware resources .
  • 3. Operating systems
    Operating systems are divided in to three basic categories :
    1.Stand-alone OS: is a complete operating system that works on a desktop computer ,notebook computer, or mobile computing device.
    Names of Stand-alone operating systems: DOS /Early Windows Versions (Windows 3.x,Windows 95, Windows NT Workstation, Windows 98, Windows 2000 professional, Windows Millennium Edition, Windows XP)/Windows Vista/ Mac OS X/UNIX/Linux.
    2.Server OS: is an operating system that is designed specifically to support a network.
    Names of Server operating systems: Early Windows server versions(Windows NT Server, Windows 2000 server, Windows Server 2003)//Windows Server 2008 /UNIX /Linux /Solaris/ Netware.
  • 4. -Embedded OS :The operating system on mobile devices and many consumer electronics.
    -Names of embedded OS :Windows Embedded CE/Windows Mobile/ Palm OS / i Phones OS /BlackBerry/ Embedded Linux /Symbian OS.
    ~The Boot Process~
    -Is the process of starting or restarting a computer is called booting.
    -When turning on a computer that has been powered off completely, you are performing a cold boot. A warm boot is the process of using the operating system to restart a computer.
    -Steps of the boot process:-
    1-The power supply sends a signal to the components in the system unit.
    2-The processor finds the ROM chips(s) that contains the BIOS (basic input/output system.
  • 5. 3-The BIOS performs the POST (power on self test) ,which checks components ,such as the mouse , keyboard &adapter cards.
    4-The results of the POST are compared with data in a CMOS (Complementary metal-oxide semiconductor) chip.
    5-The BIOS may look for the system files on a USB flash drive or on an optical disc drive or may look directly on drive C (hard disk).
    6-The system files and the kernel of the operating system load into memory (RAM) from storage (i.e., hard disk).
    7-The operating system loads configuration information , may request user information , starts several background processes , and displays the desktop on the screen
  • 6. Functions of operating systems
    -Starting and shutting down a computer (cold or warm boot).
    -Providing a user interface.
    -Managing computers & Memory.
    -coordinating Tasks.
    -Configuring Devices.
    -Establishing an Internet connection.
    -Monitoring Performance.
    -Providing file management & other utilities.
    -And automatically updating itself &certain utility programs.
    • -Control a network & administer security.
  • What is a utility program?
    • A utility program , also called a utility, is a type of software that allows a user to perform maintenance- type tasks ,usually related to managing a computer , its devices or its programs.
    • 7. Functions of utility programs
    • 8. Managing/searching for files.
    • 9. Viewing images
    • 10. Uninstalling programs
    • 11. Cleaning up/Defragmenting disks
    • 12. Backing up files & disks
    • 13. Setting up screen savers
    • 14. Securing a computer from unauthorized eccess
    • 15. Protecting against viruses/removing spyware & adware
    • 16. Filtering Internet content
    • 17. Compressing files
    • 18. Playing media Files/Burning optical discs.
    • 19. & Maintaining a personal computer.
  • Q?
    1-What is system software? Name the types of system software.
    2-What does POST ,BIOS & CMOS stand for and name their functions?
     