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System Software Chapter 5

System Software Chapter 5. Introduction. Master program Controls all hardware connected to computer Collection of programs. Application software. Operating System/ system software. Users. Hardware. System Software. Handles the technical details

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System Software Chapter 5

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  1. System SoftwareChapter 5

  2. Introduction • Master program • Controls all hardware connected to computer • Collection of programs Applicationsoftware OperatingSystem/systemsoftware Users Hardware

  3. System Software • Handles the technical details • Includes the operating system, utilities, device drivers, and language translators

  4. Operating Systems • A collection of programs that handle technical tasks, including managing computer resources • Every computer has an operating system (OS), such as Windows 7 or Mac OS X • The OS provides the interface between the user and computer, and is required to run applications

  5. Functions of an Operating System • Manages computer resources • Coordinate memory, processing storage, and printers • Monitor system performance • Provide security • Start-up the computer • Provides user interface • Character-based interface • Graphical user interface (GUI) • Runs applications • Multitasking • Foreground and background applications

  6. The Layers Of A Computer System Humans Program Interface User Programs O.S. Interface O.S. Hardware Interface/ Privileged Instructions Disk/Tape/Memory

  7. Layers of System Software

  8. Booting • Booting is the process of bringing OS from Hard disk to RAM

  9. Categories of Operating Systems • Hundreds of operating systems • Three basic categories • Embedded operating systems (handheld) • Network operating systems (linked computers) • Stand-alone operating systems (desktop)

  10. Storage Hierarchy Very fast storage is very expensive. So the Operating System manages a hierarchy of storage devices in order to make the best use of resources. In fact, considerable effort goes into this support. Fast and Expensive Slow an Cheap 1: Operating Systems Overview

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