Intended for use as a networking source for microcomputer users, this directory collates the results of a survey on microcomputer usage in school and public libraries in South Dakota that was conducted in the spring of 1990. Entries are divided by type of library. Subsections within the school section are a directory of libraries that report any usage of microcomputers for library management functions and libraries that are utilizing various cable and satellite news programs; an alphabetical list of hardware and software being used for library management functions; a directory of activities for which microcomputers are being utilized (arranged in alphabetical order by function, and then alphabetical order by name of school district or school name in the case of private or Bureau of Indian Affairs schools); a list of CD-ROM products and where they are in use; and a list of schools that are using the major cable and satellite news programs. The public library section is very similar, except that it does not include the list of cable/satellite locations. Accompanying graphs show the major functions for which microcomputers are used in the school and public libraries that participated in the survey. (KRN)