Graphical User Interface

Operating system is a program that runs on a computer. It also helps in running other programs on computer. It performs various tasks such as recognizing input from the keyboard, sending output to the monitor, keeping track of files and directories on the disk and controlling peripheral devices such as printers. Windows XP, Windows Vista, Windows 7 and Linux are the different types of operating system. Operating system is considered as the backbone of computer.

Graphical User Interface (GUI) allows users to interact with electronic devices and images rather than text commands. Windows is one of the most popular user friendly GUI operating system. The first window that appears on screen after the booting process is called desktop. A desktop typically has items called Icons in addition to the Start button, Taskbar and several windows. A window is a typical rectangular area consisting of application, document or dialog. The different types of windows are application window, document window and dialog window. Application window allows the user to open a document to perform various tasks. The elements of application window are title bar, menu bar, workspace and scroll bar. Icons are the small images that represent window elements on the desktop. Application icon invokes the related application. System icons are available on the desktop to perform various tasks related to system. Disk drive icon is used to open different types of drive. Storage locations that store files or group of files under them are known as Directories or folders. Directory is an organizational unit or container used to organize folders and files into a hierarchical structure. When there are multiple windows opened, they can be arranged in three different ways - Cascade Window, Tile Window Horizontally and Tile Window Vertically. Windows OS also allows the user to manage files and folders.

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