Introduction to Operating System

Introduction to Operating System

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  Basic of OperatingSystem Imtiaz Ahmed S10326 Mr. Muhammad Mohsin Hakro Basics of Operating System ISLAMABAD APPLIQUE Learning Center of Arts & Technology Trainee: Code: Tutor: Subject: Institute:
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  What is OperatingSystem? The definition of an 'operating system' is bound to evolve with customer demands and technological possibilities. Virginia Postrel  An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is an essential component of the system software in a computer system.  Software that controls the allocation and usage of hardware resource such as memory, CPU time, disk space and input output devices.  The foundation software of a machine; that which schedules tasks, allocates storage, and presents a default interface to the user between application.
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  Operating System Objectives Convenience  Makes the computer more convenient to use  Efficiency  Allows computer system resources to be used in an efficient manner  Ability to evolve  Permit effective development, testing, and introduction of new system functions without interfering with service
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  Services Provided bythe OS  Program development (Editors and debuggers)  Program execution  Access to I/O devices  Controlled access to files  System access  Error detection and response  Accounting
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  Components of OS TheUser Interface The Kernel Program Execution Protect Mode, Supervisor Mode and Virtual Modes Memory Management Virtual Memory Multitasking Disk Access & File Systems Device Drivers Networking Security
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  Types of OperatingSystems
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  Enhancing an OperatingSystem  Utilities  Provide services not included with OS  Backup software  Archives files onto removable media & ensures data integrity  Anti-virus software  Crucial utility and Finds, blocks and removes viruses  Firewall  Crucial utility, protects your computer from intruders  Intrusion detection  Part of firewall package and announces attempts to breach security  Screen savers  Crucial utility for command line , prevents burn in, fun & decoration
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  Thank you –Questions ? Reference Book/Web: Introduction to Computers , Peter Norton - McGraw-Hill. www.mhhe.com/peternorton  Background & Images Simple white back-color made due to clear reading and easy comprehension of terms and used images for proper visualization  Fonts Simple Calibri font style have been used for smooth reading visualization of writing  Reference Reference has been quoted for further self learning of students This planet came with a set of instructions, but we seem to have misplaced them. Civilization needs a new operating system. Paul Hawken