There are two basic designs for speed limit signs: the Vienna Convention on Road Signs and Signals specifies a white or yellow circle with a red border, while the "Manual on Uniform Traffic Control Devices" (MUTCD) published by the United States Federal Highway Administration specifies a white rectangle with the legend "SPEED LIMIT". Vienna-style speed limit signs originated in Europe and are used in most of the world, including many countries that otherwise follow the MUTCD. Variations on the MUTCD design are used in Canada, Guam, Liberia, Puerto Rico, the United States, and the U.S. Virgin Islands.