If you are using a mouse, an icon of a downward-pointing arrow inside a circle will appear on the lower-left of the Start Screen. Click it, and the Start Screen scrolls up to reveal the Apps page listing all of your installed apps. You can use the new search box to find a specific app, or sort this list of them by name, “date installed,” or “most used.” (To reach the Apps page in Windows 8, you have to right-click on the Start Screen, which brings up the App Bar along the bottom of the screen, and click on the Apps icon set on the far right of the App Bar.)