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System Software

System Software. What is System software ? consists of the programs that control or maintain the operations of the computer and its devices. There are two types of system software:. Pages 398 - 399. Operating Systems.

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System Software

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  1. System Software • What is System software? • consists of the programs that control or maintain the operations of the computer and its devices. • There are two types of system software:

  2. Pages 398 - 399 Operating Systems • An operating system(OS) is software that coordinate all the activities among computer hardware resources.

  3. start the computer provide a user interface manage programs administer security control a network establish an Internet connection schedule jobs and configure devices monitor performance provide file management and other utilities Operating Systems

  4. Operating System Functions • The process of starting or restarting a computer is called booting.

  5. Operating System Functions

  6. Operating System Functions • You can boot from a boot disk, which contains a few system files that will start the computer. • Also called a recovery disk

  7. Page 402 Operating System Functions • An operating system includes various shut down options:

  8. Operating System Functions • What is a user interface? • controls how you enter data and instructions and how information is displayed on the screen. • There are two main types of user interfaces: • GUI – graphical user interface • Command Line

  9. Operating System Functions • A graphical user interface (GUI) allows the user to interact with menus and visual images.

  10. Operating System Functions • With a command-line interface, a user uses the keyboard to enter data and instructions. • They are difficult to use because they require exact spelling, grammar, and punctuation.

  11. Operating System Functions • How an operating system handles programs directly affects your productivity

  12. Operating System Functions • What is multi-tasking? • Working on two or more programs that reside in memory at same time. • Foreground • Contains programs you are currently using. • Background • Contains programs that are running, but not currently in use.

  13. Operating System Functions • A multiprocessing operating system that is capable of supporting and using more than one processor. • A multiuser operating system is capable of supporting more than one user at a time. • Many operating systems only service one user at a time. • Some operating systems must handle requests from many users at the same time. • Web servers, Database servers, DNS servers, File servers, etc… • Windows Server & Unix operating systems can do both functions.

  14. Operating System Functions • Memory managementoptimizes the use of RAM. • Virtual memoryrefers to an operating system borrowing space from the hard drive when it runs out of space in RAM memory.

  15. Operating System Functions

  16. Operating System Functions • Operating systems typically provide a means to establish connections to the Internet, wireless network or other networks.

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

  18. Operating System Functions • MAC OS X – Activity Monitor

  19. Operating System Functions • Operating systems often provide tools for:

  20. Embedded Network Stand-alone Types of Operating Systems • Three categories of operating systems:

  21. Types of Operating Systems

  22. 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.

  23. Stand-Alone Operating Systems • DOS • Developed in the early 1980s for personal computers. • Microsoft developed the operating system for IBM. • No longer used today because it doesn’t offer a GUI.

  24. Stand-Alone Operating Systems • Windows Vistais Microsoft’s fastest, most efficient operating system to date. • Windows 7 is slated to replace it as Microsoft’s latest operating system.

  25. Stand-Alone Operating Systems

  26. Stand-Alone Operating Systems • The Macintosh operating systemhas set the standard for operating system ease of use. • Latest version is Mac OS X named “Snow Leopard”.

  27. Stand-Alone Operating Systems • Unix • Used mainly by power users because if its flexibility and power. • Primarily used for servers, but available for computers of all sizes. • Most versions offer a GUI. • Developed in the early 1970s.

  28. Stand-Alone Operating Systems • Linux • Popular Unix-type operating system. • Many versions of Linux are available and most are free. • Open-source software: code is available to public. • Created by LinusTorvalds

  29. Server Operating Systems

  30. Server Operating Systems • Windows Server 2008is an upgrade to Windows Server 2003. • Operating system used to service the requests of many users. • Web servers, File servers, Database servers, etc… • Most editions include Hyper-V, a virtualization technology. • Virtualization is the practice of sharing or pooling computing resources.

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

  32. Embedded Operating Systems

  33. Utility Programs • A utility programis a type of system software that allows a user to perform maintenance-type tasks. • Also called a utility.

  34. 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.

  35. Utility Programs • A search utilityis a program that attempts to locate a file on your computer based on criteria you specify.

  36. Utility Programs • An image viewerallows users to display, copy, and print the contents of a graphics file. • An uninstaller removes a program, as well as any associated entries in the system files.

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

  38. 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

  39. Utility Programs • Disk defragmenter

  40. Utility Programs • A backup utilityallows users to copy files or an entire hard disk to another storage medium. • A restore utility reverses the process and returns backed up files to their original form.

  41. Utility Programs • A personal firewall detects and protects a personal computer from unauthorized intrusions.

  42. Utility Programs • An anti-virus program detects and protects a computer from computer viruses. • An anti-spyware program detects and protects a computer from spyware. • Spyware is a program that is placed on a computer without the owner’s knowledge.

  43. Utility Programs • Filters are programs that remove or block certain items from being displayed.

  44. Utility Programs • A file compression utilityshrinks the size of a file(s). • Compressing files frees up room on the storage media. • Compressed files sometimes are called zipped files • Can be uncompressed. • Software is required to compress and uncompress files.

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

  46. Utility Programs • Disc burning softwarewrites text, graphics, audio, and video files on a recordable or rewritable optical disc.

  47. Utility Programs • A personal computer maintenance utility identifies and fixes operating system problems, detects and repairs disk problems, and includes the capability of improving a computer’s performance.

  48. Quote of the day… "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe." --Albert Einstein

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