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Topic 6 Presentation Transcript

  • 1. CHAPTER 6.1
  • 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. 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. 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. OPERATING SYSTEM FUNCTIONS
  • 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. 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. 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. 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. OPERATING SYSTEM FUNCTIONS• With a command-line interface, a user uses the keyboard to enter data and instructions
  • 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. OPERATING SYSTEM FUNCTIONS
  • 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. OPERATING SYSTEM FUNCTIONS: Coordinating Tasks• The operating system determines the order in which tasks are processed
  • 15. OPERATING SYSTEM FUNCTIONS
  • 16. OPERATING SYSTEM FUNCTIONS: Configuring Devices• Operating systems typically provide a means to establish Internet connections
  • 17. OPERATING SYSTEM FUNCTIONS: Monitoring Performance• A performance monitor is a program that assesses and reports information about various computer resources and devices
  • 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. 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. 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. TYPES OF OPERATING SYSTEMS
  • 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. 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. 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. TYPES OF OPERATING SYSTEMS: Server Windows UNIX Server 2008 Linux Solaris
  • 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. 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. TYPES OF OPERATING SYSTEMS: Embedded
  • 29. UTILITY PROGRAM• A utility program is a type of system software that allows a user to perform maintenance- type tasks
  • 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. 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. 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. 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. 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. 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. UTILITY PROGRAM
  • 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. 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. UTILITY PROGRAM• A media player allows you to view images and animation, listen to audio, and watch video files on your computer
  • 40. UTILITY PROGRAM• Disc burning software writes text, graphics, audio, and video files on a recordable or rewritable optical disc
  • 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