Some of the programs that we use in Windows, have a system menu containing an option – Always on top. If selected, this feature sets a window to be always on top of other windows. This is very useful if you want to work across multiple windows but want to focus more of your attention on a particular window. You can set that window to be always on top and keep an eye on it. I personally use this feature to set my TV Tuner window to be always on top so that I can enjoy TV programs while doing work at the same time.