I learned a new fact today. I always thought an acronym was any series of letters used as a shortened version of several words using the first letter of each word. Apparently an acronym is only an acronym if it's pronouncable as a word, like SCUBA, LASER or NASA. If it's not pronouncable as a word, it's an initialism. So, FBI, UFO, and AKA are initialisms, because they're verbalized by their initials, not as fubi, oofo, or acka. What completely new idea or fact (trivial, interesting, mindblowing, world-shattering or otherwise) did you learn today or recently that you didn't know before?