ICE

(WebMD) Got your cell phone handy? Take a moment right now to put "ICE" by the names of the people you'd want called in case of emergency. That's what "ICE" stands for — "in case of emergency." The point is to let rescue workers, police, or doctors check your cell phone and reach the people you would want contacted if you're in an accident or other emergency. Most people don't have ICE on their cell phones, but they'll plug those letters into their cell phones once they learn why it's important.