The objective of Japanese Standards Association (JSA), is to educate the public regarding the standardization and unification of industrial standards. The publication and distribution of Japanese Industrial Standards (JIS) is the bedrock on which all JSA's activities stand. JIS are classified into more than 15 categories which include railway engineering, ship building, ferrous material and metallurgy, mining, pulp and paper. JSA issues English versions of the JIS which are particularly significant from the perspective of international trade. JSA develops and markets physical standards and tools based on JIS that are used for standardization and quality control.