A pool of authority records for bibliographic entities (persons, corporate bodies, works/expressions, concepts, objects, events, and places) to use on the Internet is of interest, not only to libraries and their users, but also to publishers, copyright and rights management organizations, museums, and archives. This paper explores different models of how such a file might work. Authority control remains the most expensive part of cataloging, but through cooperative efforts like NACO (Name Authority Cooperative), SACO (Subject Authority Cooperative), and IFLA (International Federation of Library Associations and Institutions) initiatives, the research done in one library can be shared internationally to lower the cost. (Author/MES)