OPERATING SYSTEM
An operating system is a software component of a computer system that is responsible for the management of various activities of the computer and the sharing of computer resources. It hosts several applications that run on a computer and handles the operations of computer hardware. Users and application programs access the services offered by the operating systems, by means of system calls and application programming interfaces. Users interact with a computer operating system through Command Line Interfaces (CLIs) or Graphical User Interfaces known as GUIs. In short, an operating system enables user interaction with computer systems by acting as an interface between users or application programs and the computer hardware. Some of the common operating systems are LINUX, Windows,etc.
WINDOWS XP DESKTOP ELEMENTS
Start Menu
When clicked on the start button, start menu appears on the screen giving all the available options to start using the Windows. Desktop icons provide access to commonly used programs, folders and files.
Task Bar
When you start the computer system, then start button and task bar appears on the bottom of the screen and by default remains visible when Windows is running (See Fig. 1.14). Whenever a program is run or a window is opened, an icon representing the program appears on the taskbar. To switch between windows or program, click on the icon representing the window on the task bar. When the program or window is closed, the icon disappears from the task bar.
The system tray is part of the task bar and displays the current time as well as the status icons.
1 Start a Program
To start a program, do the following;
1. Click on the Start Button.
2. Click on the All Programs, you will see a list of all
the program icons and program folders.
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