Topic 6

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Topic 6

  1. 1. CHAPTER 6.1
  2. 2. COMPUTER SOFTWARE• Software a.k.a program consists of a series of related instructions, organized for a common purpose, that tells the computer what task to perform and how to perform them. System Application Computer software software software
  3. 3. SYSTEM SOFTWARE• System software consists of the programs that control or maintain the operations of the computer and its devices Operating Utility systems Programs
  4. 4. OPERATING SYSTEM• OS is a set of programs containing instructions that works together to coordinate all the activities among computer hardware resources.• Sometimes called platform.• Cross-platform program: can runs the same on multiple OS.
  5. 5. OPERATING SYSTEM FUNCTIONS
  6. 6. OPERATING SYSTEM FUNCTIONS: Starting and Shutting Down a Computer• The process of starting or restarting a computer is called booting Cold boot Warm boot• Turning on • Using the a computer operating that has system to been restart a powered off computer completely
  7. 7. OPERATING SYSTEM FUNCTIONS: Starting and Shutting Down a ComputerA boot drive is the drive fromwhich your computer starts• You can boot from a boot disk• A recovery disk contains a few system files that will start the computer
  8. 8. OPERATING SYSTEM FUNCTIONS: Starting and Shutting Down a Computer • An operating system includes various shut down optionsSleep mode saves any open Hibernate saves any opendocuments and programs to documents and programs to RAM, turns off all a hard disk before unneeded functions, and removing power from thethen places the computer in computer a low-power state
  9. 9. OPERATING SYSTEM FUNCTIONS: Providing User Interface• A user interface controls 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
  10. 10. OPERATING SYSTEM FUNCTIONS• With a command-line interface, a user uses the keyboard to enter data and instructions
  11. 11. OPERATING SYSTEM FUNCTIONS: Managing Programs• How an operating system handles programs directly affects your productivitySingle user: One usermultiuser: Enables two Single tasking and Foreground andor more users to runs multitasking background programs simulataneously Preemptive multitasking: OS interrupts a prog that is executing and passes Multiprocessing control to another prog waiting to be executed.
  12. 12. OPERATING SYSTEM FUNCTIONS
  13. 13. OPERATING SYSTEM FUNCTIONS: Managing Memory• Memory management optimizes the use of RAM• Virtual memory is a portion of a storage medium functioning as additional RAM
  14. 14. OPERATING SYSTEM FUNCTIONS: Coordinating Tasks• The operating system determines the order in which tasks are processed
  15. 15. OPERATING SYSTEM FUNCTIONS
  16. 16. OPERATING SYSTEM FUNCTIONS: Configuring Devices• Operating systems typically provide a means to establish Internet connections
  17. 17. OPERATING SYSTEM FUNCTIONS: Monitoring Performance• A performance monitor is a program that assesses and reports information about various computer resources and devices
  18. 18. OPERATING SYSTEM FUNCTIONS: Providing File Management and other Utilities• Operating systems often provide users with the capability of: Searching for Viewing Securing a Managing files files images computer Uninstalling Cleaning up Defragmenting Diagnosing programs disks disks problems Backing up Setting up files and disks screen savers
  19. 19. OPERATING SYSTEM FUNCTIONS: Controlling a Network• Some operating • A network systems are designed administrator uses to work with a server on a network the server operating system to:• A server operating system organizes and – Add and remove coordinates how users, computers, an multiple users access d other devices and share resources on – Install software and a network administer network security
  20. 20. OPERATING SYSTEM FUNCTIONS: Administering Security• Each user has a user account – A user name, or user ID, identifies a specific user – A password is a private combination of characters associated with the user name
  21. 21. TYPES OF OPERATING SYSTEMS
  22. 22. TYPES OF OPERATING SYSTEMS: Stand Alone• A stand-alone operating system is a complete operating system that works on a desktop computer, notebook computer, or mobile computing device Windows Mac OS X 7 UNIX Linux
  23. 23. TYPES OF OPERATING SYSTEMS: Stand Alone• The Macintosh operating system has set the standard for operating system ease of use• Latest version is Mac OS X
  24. 24. TYPES OF OPERATING SYSTEMS: Stand Alone UNIX is a multitasking operating system developed in the early 1970s Linux is an open- source, popular, multitasking UNIX-type operating system
  25. 25. TYPES OF OPERATING SYSTEMS: Server Windows UNIX Server 2008 Linux Solaris
  26. 26. TYPES OF OPERATING SYSTEMS: Server• Windows Server 2008 is an upgrade to Windows Server 2003 – Part of the Windows Server 2008 family – Multiple editions• Most editions include Hyper-V, a virtualization technology – Virtualization is the practice of sharing or pooling computing resources
  27. 27. TYPES OF OPERATING SYSTEMS: Embedded • An embedded operating system resides on a ROM chip on a mobile device or consumer electronic device Windows Windows Palm OS iPhone OSEmbedded CE Mobile Google Embedded Blackberry Symbian OS Android Linux
  28. 28. TYPES OF OPERATING SYSTEMS: Embedded
  29. 29. UTILITY PROGRAM• A utility program is a type of system software that allows a user to perform maintenance- type tasks
  30. 30. UTILITY PROGRAM• A file manager is a utility that performs functions related to file management – Displaying a list of files – Organizing files in folders – Copying, renaming, deleti ng, moving, and sorting files and folders – Creating shortcuts
  31. 31. UTILITY PROGRAM• An image viewer allows 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
  32. 32. UTILITY PROGRAM• A disk defragmenter reorganizes 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
  33. 33. UTILITY PROGRAM• A backup utility allows users to copy files to another storage medium• A restore utility reverses the process and returns backed up files to their original form
  34. 34. UTILITY PROGRAM• A screen saver causes a • A personal firewall display device’s screen detects and protects to show a moving a personal computer image or blank screen from unauthorized if no activity occurs for intrusions a specified time
  35. 35. UTILITY PROGRAMA• virus describes acauses a display device’s screen A screen saver potentially damaging computer to show a that affects a computer screen if no program moving image or blank negatively activity occurs for a specified timeA worm copies A Trojan horse An antivirus itself hides within or program repeatedly in looks like a protects a memory or legitimate computerover a network program against viruses
  36. 36. UTILITY PROGRAM
  37. 37. UTILITY PROGRAMSpyware is a program placed on Adware displays an online a computer without the user’s advertisement in a banner orknowledge that secretly collects pop-up window information about the user• A spyware remover detects • An adware remover is a and deletes spyware and program that detects and other similar programs deletes adware
  38. 38. UTILITY PROGRAM• A file compression utility shrinks the size of a file(s) – Compressing files frees up room on the storage media – Two types of compression • Lossy • Lossless• Compressed files sometimes are called zipped files – Can be uncompressed
  39. 39. UTILITY PROGRAM• A media player allows you to view images and animation, listen to audio, and watch video files on your computer
  40. 40. UTILITY PROGRAM• Disc burning software writes text, graphics, audio, and video files on a recordable or rewritable optical disc
  41. 41. UTILITY PROGRAM• 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

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