The Music Publishers' International ISMN Database can be used to quickly find the publisher and the country of origin for a given ISMN. It lists addresses and telecommunication numbers of several thousands of music publishers and similar institutions linked to the production of notated music, from many countries all over the world. The database is the most comprehensive up-to-date reference tool for the notated music trade and the library world. It will be constantly updated with data supplied by the national ISMN agencies.