This report focuses on the two-part mission of New York library systems and provides a vision for library systems in the 1990s and beyond. The plan's 5 goals for library systems and 18 action steps will further the dual mission: (1) serving member libraries and enabling them to improve their servcices to users; and (2) serving as a component of the statewide library network, enabling the effective functioning and continued development of the network, and sharing resources with all types of libraries through cooperation and coordination. The goals include: being responsive and accountable to system members, providing cost-effective services, assisting member libraries to become Electronic Doorway Libraries, maximizing access to library resources for New York State residents, and participating equitably in the statewide library network. This report opens with a summary of the manual; maps showing the three library systems in the state, i.e., public library systems, reference and research library resources systems, and school library systems; and a discussion of the vision for (and missions of) these library systems. A profile is then provided for each of the goals which delineates the action steps involved in its achievement and brief explanations of the action steps. Descriptions of the concept of the Electronic Doorway Library and the Statewide Library Network are included. A timetable is then given which identifies the implementation and duration of the action steps. A brief history of the development of this plan, beginning with the study of New York State's library systems conducted by King Research in 1989, concludes this report. It is noted that some action steps are slated to begin in 1991, but that staff resources at all levels and funds for travel, printing, and mailing will affect the speed with which implementation can take place. (MAB)