Many people sometimes use the RUN option in the start menu of Windows to execute certain applications. The advance users prefer typing with keyboards instead of using the mouse clicks. It is easy to just simply launch some application from the run menu rather than holding your mouse over to some menu and then click, click and click. For instance, I dont go to the Start Menu, All Programs, Accessories and then open Paint. Instead what I do is, I simply open start menu and type mspaint in the RUN command line and enter – there you go. Similarly for launching the calculator, I simply type calc in the RUN command line.