For the first time, four musical works published by Cagayan State University through the Knowledge & Technology Management and Publication Office (KTMPO) have been officially registered under the International Standard Music Number (ISMN) system. These registrations were processed through the International Standard Numbering Systems – Philippine Online Application System (INS-POAS) of the National Library of the Philippines, the official online application system for ISBN, ISSN, and ISMN registration in the country.