Windows predecessor MS-DOS (Microsoft Disk Operating System)

Introduction 
Windows predecessor MS-DOS (Microsoft Disk Operating System) was the most popular operating system earlier. However, its numerous drawbacks led to the emergence of a new class of system software. Windows, which was a product of this class, was based on a radically different approach called Graphical User Interface (GUI). 
The user is not expected to memorise or type any command; all that he needs to do is click on the appropriate picture (icon) with thehelp
of a small hand-held device called a mouse. Using a mouse is easier than using a keyboard. In aGraphical User Interface, the various commands and options are represented on thescreen in the form of small images called ‘Icons’. Clicking on an icon is easier than  typing commands through a keyboard. GUI based interfaces work on WYSIWYG (What You See Is What You Get) technology, making the work of the user easier. Therefore, GUI-based interfaces are much more user friendly. With Windows, Microsoft has successfully addressed all the limitations of MS-DOS, in addition to the new user-friendly features. Windowshas been aptly named as it rightly facilitates the users to work on several Windows simultaneously..