Adapted from a chapter in: Rudnik, Compostable Polymer Materials (2008). Internationally recognized standardization bodies, such as the International Organization for Standardization (ISO), as well as regional standardization bodies, such as the American Society for Testing and Materials (ASTM) and the European Committee for Standardization (CEN), are actively involved in developing standards related to composting and biodegradation. In addition, national standardization bodies, such as the German Deutsches Institut für Normung (DIN) and the Biodegradable Plastics Society (BPS) of Japan, contribute to the development and issuing of standards on compostable polymers. Recently, interest in developing national standards related to compostability, and biodegradation testing appeared in other regions of the world, e.g., in China, Taiwan, and Australia.