A Note from the Guest Editor

Standards are all around us but are often invisible. The keypad on your telephone is arranged the same way no matter who makes your phone, the valve stem on your car’s tires works with any air-pressure gauge or air pump, and credit cards and driver’s licenses are all the same size so they will fit into any wallet. Ironically, we tend to notice only the things that for some reason aren’t standardized: clothing sizes from different manufacturers, power adapters for electronics, and which side of the road you drive on in which country.