You ever wonder what all of those letters we use to define certain things (usually technological gizmos, government agencies, and fried chicken chains that want to downplay the "fried" aspect of their menu) actually mean? I was shopping earlier today and realized that I had no idea what USB stood for. I was pretty sure the U was for "universal," but was lost after that first letter. Then I started thinking about other acronyms that I wasn't sure about, and decided to start researching. How many of these did you know?