This report presents a proposed program plan for developing an integrated library network in the State of Washington. The need for such a plan arises from the requirements of Title III of the Library Services and Construction Act and from the increasing demands placed upon libraries and the resulting need to use available resources better. The intent of the program is (1) to promote the increased sharing of resources by libraries, particularly of different kinds and with different area jurisdictions; (2) to use modern technology in an appropriate, economic manner to facilitate the sharing of resources; and (3) to expand the availability of library materials to every resident of the State. Although elements of the program are already in existence, in experimentation, or in discussion, the plan proposed a logical integration of these elements into a single planned progression of steps. Included in this report are a description of the proposed network, the program plan and schedule for implementation, and the specifications of the processing center and switching center. Aspects of the network which are described include geographical area groups, the State Library Card Production Service, specialty groups, a switching center to provide access to major library resources and geographical speciality groups, and technical services. A list of available sources of catalogs and indexes on magnetic tape is appended. (Author/JB)