No one? Let this be my first 3AM post, and a reminder of why I shouldn't be up now.
Use a frying pan to fry, and a saute pan to saute. Never saute in a frying pan.
A skillet is the bastard child of the frying and saute pans.
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A saute pan is a straight-sided frying pan that allows food to be flipped and tossed with less spattering. The sides are usually about 3 inches high; the pan can measure from 6 to 14 inches wide. It's perfect for quickly flying food in very little oil. A saute pan generally has a long handle on one side and comes with a lid.
A skillet has sides that flare outward. It's shallow with sloped sides that prevent steam from forming in the pan. It's great for scrambling, searing, and shallow frying.