Windows Operating system is the most powerful operating system software programs for personal computer developed by Microsoft corporation USA. Its designed based on graphical User Interface. In the graphical User Interface based operating system, the user can supply the commands & instructions from the menu options using a pointing device called mouse. There are different types of graphical signs that represent instructions, commands, programs, datas, etc. To execute such type of program items, the user does not used to type a command or instruction from the keyboard, He/She can execute by clicking on the icon of the programs. GUI allows to open multiple programs at a time in separate windows So, it is a very easy & operating system. These days, there are so many various versions of windows GUI based operating system programs are available such as windows '95, Windows '98, Windows 2000, Windows XP (export professional), etc.
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