Acronyms got you puzzled? Try http://www.acronymfinder.com/
“With more than 600,000 human-edited definitions, Acronym Finder is the world’s largest and most comprehensive dictionary of acronyms, abbreviations, and initialisms. New! You can also search for more than 850,000 US and Canadian postal codes.”
The kewlness factor:
They have a handy button you can add to your Google searchbar so that looking up an acronym is just one click from your search box.