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Amr Chap 08 Operating Systems & Utility Programs

Amr Chap 08 Operating Systems & Utility Programs






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

    • Operating Systems & Utility ProgramsChapter 8
      By Amr Aborig.
    • 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 .
    • 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.
    • -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.
    • 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
    • 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.
      • Functions of utility programs
      • Managing/searching for files.
      • Viewing images
      • Uninstalling programs
      • Cleaning up/Defragmenting disks
      • Backing up files & disks
      • Setting up screen savers
      • Securing a computer from unauthorized eccess
      • Protecting against viruses/removing spyware & adware
      • Filtering Internet content
      • Compressing files
      • Playing media Files/Burning optical discs.
      • & 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?
       