The Library Systems contain a central system designed to track items owned, borrowed, or returned, orders made, and bills paid. It includes Acquisitions, Cataloging, Circulation, and Serials. The Acquisition module is used to order, receive, and invoice materials. For classification and indexing of materials, we us the Catalog module. The Circulation module tracks materials loaned (checked out) and materials returned (checked in). To track journal subscriptions, electronic resources and digital collection holdings, we use the Serials module.