Functions Of Operating Systems

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An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function.
Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, printing, and other resources.
For hardware functions such as input and output and memory allocation, the operating system acts as an intermediary between programs and the computer hardware,[1][2] although the application code is usually executed directly by the hardware and will frequently make a system call to an OS function or be interrupted by it. Operating systems can be found on almost any device that contains a computer—from cellular phones and video game consoles to supercomputers and web servers.
Examples of popular modern operating systems include Android, BSD, iOS, Linux, OS X, QNX, Microsoft Windows,[3] Windows Phone, and IBM z/OS. All these, except Windows, Windows Phone and z/OS, share roots in UNIX.
Presentation Regarding functions of operating systems and their working and other information regarding their uses and types. Useful for Students and other for knowing better about them.
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Functions Of Operating Systems

  1. 1. Operating Systems Functions of Operating Systems
  2. 2. Presented By: Akshay Kurup Nikhar Narula
  3. 3. Index  Introduction  What is Operating System ?  Major Functions of Operating Systems  Types of operating systems  Different types of OS
  4. 4. Introduction  The operating system is the core software component of your computer. It performs many functions and is, in very basic terms, an interface between your computer and the outside world. In the section about hardware, a computer is described as consisting of several component parts including your monitor, keyboard, mouse, and other parts.
  5. 5. What is an Operating System ? The operating system is the most important program that runs on a computer. Every general-purpose computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers.
  6. 6. Major Functions of Operating System  Providing an interface to the user.  Managing system resources.  Managing security and access rights.  Running applications  Process Management  Memory Management  Extended Machine  Mastermind
  7. 7. Functions of Operating System  Booting the computer  Performs basic computer tasks eg managing the various peripheral devices eg mouse, keyboard  Provides a user interface, e.g. command line, graphical user interface (GUI)  Handles system resources such as computer's memory and sharing of the central processing unit (CPU) time by various applications or peripheral devices  Provides file management which refers to the way that the operating system manipulates, stores, retrieves and saves data.
  8. 8. Types of Operating System • Real-time operating system(RTOS) - Real-time operating systems are used to control machinery, scientific instruments and industrial systems. • Single-user, single task - As the name implies, this operating system is designed to manage the computer so that one user can effectively do one thing at a time. • Single-user, multi-tasking - This is the type of operating system most people use on their desktop and laptop computers today. • Multi-user - A multi-user operating system allows many different users to take advantage of the computer's resources simultaneously. • Distributed - A distributed operating system manages a group of independent computers and makes them appear to be a single computer. • Embedded - Embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy.
  9. 9. Different Types of Operating Systems • • • • • • • iOS Linux OS X QNX Microsoft Windows IBM z/OS RedHat
  10. 10. Mobile OS • • • • • Google Android OS Apple iOS BlackBerry Symbian OS Windows 8

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