Acroynms are such a part of everyday life we don't often stop to think twice about them or even notice that there are several words that hide behind everyday phrases. Buzzfeed recently highlighted 25 popular acronyms that are not typically recognized or decoded.  Here are a few of my favorites:

ZIP Code: Zone Improvement Plan Code

WD-40: Water Displacement, 40th attempt

Nabisco: National Biscuit Company

CAPTCHA (aka the annoying blurry words you have to spell out to login/submit something online): Completely Automated Public Turing test to tell Computers and Humans Apart

M&M's: Mars & Murrie