United States customary units mass: tower, apothecaries', troy, avoirdupois, and metric. Of these, the avoirdupois weight is the most common system used in the U.S., although Troy weight is still used to weigh precious metals. Apothecaries weight—once used by pharmacies—has been largely replaced by metric measurements. Tower weight fell out of use in England (due to legal prohibition in 1527) centuries ago, and was never used in the U.S. The imperial system, which is still used for some measures in the United Kingdom and other Commonwealth countries, is based on avoirdupois, with variations from U.S. customary units larger than a pound. The pound avoirdupois,
Precious (Boukenger) by her parents, only to become a pawn in a joint Jyaryu/Quester operation. The is a powerful artifact that possesses what now is called Artificial Intelligence. It works much like a supercomputer, retrieving data, programs and abilities from whatever system or machine it connects with. When used for peace, this Precious can be used to efficiently operate hospitals or shelters. When used wrongfully, it can override and take control of any security system. The is an ancient iron rod capable of destroying a whole mountain with a single blow. It is sealed deep within a mountain, but when stolen, the