What 'UL Listed' Means on Electronics, and Why You Should Look for It
by Elizabeth Yuko from Lifehacker on (#608HT)

If you've paid close attention to labels on any electric products, devices, or appliances, you may have noticed a small mark with the initials UL" on it. It's not something associated with a particular company or brand of products, and is one of those things that once you know it's there, you start noticing them all...