Name tag is a metal plate engraved with equipment information or item information. It refers to the nameplate that is fixed on the product to provide users with information such as manufacturer‘s trademark identification, brand distinction, and product parameter engraving after the product is put on the market. It is also called a sign. The nameplate is mainly used to record some technical data of the manufacturer and rated working conditions for correct use without damaging the equipment. The materials for making nameplates are divided into metals and non-metals: metals include zinc alloy, copper, iron, and aluminum. There is also a type of nameplate for identification, such as the information plate tied around the dog‘s neck. Every US military wears a name tag on their chest.