"Na" job aid

OK, so color me geek, but XKCD is one of my favorite comic strips.

Today's edition is a useful job aid to help you track the "NAs" to ID a few classic songs.



It's worth a click-through... there is always an extra punch line if you hover your cursor over the cartoon on the site. Plus, this time, there is a "new and improved" version (link under the page banner).