Key fobs are a generally pretty mundane and overlooked piece of automotive paraphernalia. A few decades ago, drivers didn't have a way to remotely unlock their cars, and now it's taken for granted.

It's funny that some words just seem to "fit" their definitions. A key fob, for example, sounds exactly like what it is — a little trinket that hangs from your keys. Of course, a key fob is actually a ...