If you've been working with computers for a while now, you might accumulated a dizzying quantity of keyboard shortcuts, for various applications and operating systems. Although most applications provide some method of determining the most common shortcuts (usually through the use of the Help section), many of them remain quite cryptic. In comes a fantastic online database called Keyonary, which is truly a useful shortcut search tool. With a simple interface, quick response and extensive database, it's the place to go to find a shortcut for an application you're using.
Take a look and add to your reference bookmarks, it's worth it.