A wide variety of plugs and power converters for international use is
available from Magellan (http://199.183.146.30/magellan/). Their printed
catalog is of particular interest to this list, since it includes a table
listed the properties of AC power in essentially all the countries in the
world. This could be useful for constructing homework problems in
electricity! To request the catalog, contact Magellan at (800) 962-4943 or
e-mail them at