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OPERATING SYSTEMS

Chapter Three. OPERATING SYSTEMS. System Software. System software consists of the programs that control or maintain the operations of the computer and its devices. 1) Operating Systems.

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OPERATING SYSTEMS

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  1. Chapter Three OPERATING SYSTEMS

  2. System Software • System softwareconsists of the programs that control or maintain the operations of the computer and its devices

  3. 1) Operating Systems • An operating system(OS) is a set of programs containing instructions that work together to coordinate all the activities among computer hardware resources

  4. Operating Systems

  5. Operating System Functions 1) Start and shut down the computer • The process of starting or restarting a computer is called booting • A boot drive is the drive from which your computer starts

  6. Operating System Functions

  7. Operating System Functions • An operating system includes various shut down options

  8. Operating System Functions 2) Provide auser interface • A user interfacecontrols how you enter data and instructions and how information is displayed on the screen • With a graphical user interface (GUI), you interact with menus and visual images

  9. Operating System Functions • With a command-line interface, a user uses the keyboard to enter data and instructions

  10. Operating System Functions 3) Manage programs

  11. Operating System Functions 4) Manage memory • Memory managementoptimizes the use of RAM

  12. Operating System Functions 5) Coordinate tasks and configure devices • The operating system determines the order in which tasks are processed

  13. Operating System Functions

  14. Operating System Functions 6) Establish an Internet connection • Operating systems typically provide a means to establish Internet connections

  15. Operating System Functions 7) Monitor performance • A performance monitor is a program that assesses and reports information about various computer resources and devices

  16. Operating System Functions 8) Provide file management and other utilities • Operating systems often provide users with the capability of:

  17. Operating System Functions 9) Update Automatically • Automatic updateautomatically provides updates to the program

  18. Operating System Functions 10) Control a network • Some operating systems are designed to work with a server on a network • A server operating systemorganizes and coordinates how multiple users access and share resources on a network • A network administrator uses the server operating system to: • Add and remove users, computers, and other devices • Install software and administer network security

  19. Types of Operating Systems

  20. Stand-Alone Operating Systems • A stand-alone operating systemis a complete operating system that works on a desktop computer, notebook computer, or mobile computing device

  21. Server Operating Systems

  22. Embedded Operating Systems • An embedded operating systemresides on a ROM chip on a mobile device or consumer electronic device

  23. Embedded Operating Systems

  24. 2) Utility Programs • A utility programis a type of system software that allows a user to perform maintenance-type tasks

  25. Utility Programs • A file manageris a utility that performs functions related to file management • Displaying a list of files • Organizing files in folders • Copying, renaming, deleting, moving, and sorting files and folders • Creating shortcuts

  26. Utility Programs • A disk cleanup utility searches for and removes unnecessary files • Downloaded programfiles • Temporary Internetfiles • Deleted files • Unused programfiles

  27. Utility Programs • A disk defragmenterreorganizes the files and unused space on a computer’s hard disk so that the operating system accesses data more quickly and programs run faster • Defragmenting

  28. Utility Programs • A backup utilityallows users to copy files to another storage medium • A restore utility reverses the process and returns backed up files to their original form

  29. Utility Programs • A virus describes a potentially damaging computer program that affects a computer negatively • An antivirusprogram protects a computer against viruses

  30. Utility Programs • A file compression utilityshrinks the size of a file(s) • Compressing files frees up room on the storage media • Can be uncompressed

  31. Utility Programs • A media playerallows you to view images and animation, listen to audio, and watch video files on your computer

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