International ISBN Agency, Berlin - Germany: General information about the ISBN (International Standard Book Numbering) system
International Standard Book Number System for Books, Software, Mixed Media etc. in Publishing, Distribution and Library Practices. The Publishers' International ISBN Directory (PIID) is published by the International ISBN Agency, Berlin and by K.G. Saur Verlag, Munich annually (usually July). The 30th edition of the PIID lists 628,795 publishers from 218 countries.
