The catalogers at Library Conversions Limited Company created the  marc4media^® system for cataloging educational media. When we first began cataloging educational resource collections, there were very few MARC records available for media products. The Library of Congress had discontinued their comprehensive services for non-print materials, MARC formats for non-print had gone through a major revision and existing records for media resources were of inconsistent and generally poor quality.

In 1993 we made a commitment to a long-term plan to provide MARC record services for non-print materials and to include in this cataloging, curriculum data elements that had recently been approved by MARBI, the Machine-Readable Bibliographic Information Committee of the Library of Congress. As far as we know, we were the only company at the time, to make this kind of a commitment and we remain, the only company today whose sole purpose is to catalog media resources for the educational community.