The computer design of the system serving the 53 library systems of the Washington Library Network provides nine online files through its integrated bibliographic and acquisitions subsystems. The bibliographic subsystem provides an authority file of author, title, series, and subject headings; a bibliographic file of MARC records on books, films, and serials; a holding file of 340,000 union holdings statements linked to appropriate bibliographic records, a working file of newly created records, and a waiting file of work requests. The acquisitions subsystem includes an inprocess of payment and order records, a standing order file, a library accounts file, and a directory file. The entire bibliographic database serves as a network-wide union catalog and a computer output microfiche catalog provides many participants with primary search tools at their branch libraries. Database searching is available on the full set of access points. Serials ordering, a circulation subsystem and interlibrary loans, and reference services are all facilitated by the computer. The Washington Library Network is presently integrating the Research Libraries Group of Stanford University and has established a cooperative program with the National Library of Australia. (RAA)