Launchy is an open source Windows and Linux utility that lets you quick start applications with just a few keystrokes. Forget your start menu and the icons on your desktop, Launchy hides in the background until you hit ALT-SPACE. Then just enter a few letters of the program you are looking for, and hit enter when it has been found.
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Same is also provided by windows XP and other Window NT OS. i.e. if we want to open the Word, Excel or Access document you can open it directly with the key word as winword, excel and access.
press window button –> Then press ‘R’ –> Type ‘Winword’ and you will get Microsoft Word open with new doc on screen.