Some times you need to quickly access system profile for various reasons. Usually you have two options. Either click on Apple in the menu bar > About This Mac > More Info of go to Applications > Utilities. But there is a third way.
If you click on the Apple in the menu bar, then press option, About This Mac will change to System Profiler. Its a simple little shortcut that could save you a little bit of time. Most menu options will give you a small hidden shortcuts if you press the option button. Try it out.