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Presentation on theme: "WHAT IS AN OPERATING SYSTEM? IS IT SOFTWARE? Operating system."— Presentation transcript:


2 An operating system or OS is a software program that enables the computer hardware to communicate and operate with the computersoftware.hardwaresoftware


4 Examples of computer operating systems: Microsoft Windows 7 Apple MacOS Ubuntu Linux Google Android iOS

5 Four Main Tasks of an Operating System Controlling and Managing Computer Hardware Running Application Programs Organizing Files Providing a User Interface

6 An operating system has two parts: a kernel and a shell. The kernel is the core of the operating system. It manages memory, files, and other devices; maintains the time and date; starts applications; and manages system resources

7 The shell provides direct communication between the user and the kernel. It is an interface between the user and the kernel.

8 There are many different types of operating systems. We can classify systems according to the type of user interface, how many users they support (single or multiple), how they perform tasks (single tasks or multiple tasks), and how they work with other computers (single computer or network).

9 The user interface is the part of the operating system that you use to enter commands and data. There are two types of user interfaces: a graphical user interface (GUI) and a command-line interface (CLI).

10 GUI - Short for Graphical User Interface, a GUI Operating System contains graphics and icons and is commonly navigated by using a computer mouse

11 A command-line interface (CLI) does not use images or graphical menus. Instead, you type commands with the keyboard, using a special command language.

12 A single-user operating system can be used only by a single user. A multi-user operating system can be used by more than one user.

13 A network operating system is an operating system specifically designed to support computer networks. A computer network is a set of computers that can communicate with each other and share sources.

14 Single-task operating systems can work only on a single task at a time. Multitasking operating systems can work on multiple tasks at the same time.

15 MS-DOS MS-DOS is short for Microsoft Disk Operating System. MS-DOS is a single-task, single-user operating system with a command-line interface

16 Some MS-DOS codes can still be used via the Command Prompt. Command Prompt is a console that comes with Windows 7.





21 Microsoft Windows 9x and Windows Me Microsoft Windows was one of the first graphical operating systems for home and office PCs. In the beginning, the early versions of Windows were just a graphical interface to MS-DOS.

22 The important releases of this new family of Windows systems are Windows 95 and Windows 98 (together called Windows 9x) as well as Windows Me.

23 Mac OS UNIX Novell NetWare Linux Ubuntu Pardus Windows NT Windows Server Family Windows XP Windows Vista Android Windows Phone 7 iOS Windows 7

24 HW2 :LIST OPERATING SYSTEM !!!! AND SEARCH WINDOWS 7 INTERFACE AND DESKTOP(15 JAN) HW1: What is an operating system? Is it software? Do I have a 32-bit or 64-bit OS?(9 JAN)

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