Access to the ISSN Register may also be made via the Z39.50 protocol.
The Z39.50 protocol refers to the standards ISO 23950 and ANSI/NISO Z39.50. It acts of a protocol of customer-server data-processing communication to seek through a data-processing network of information in data bases. It is especially used by the libraries to question several catalogues simultaneously.
For further information, contact the Sales department.