This is a summary report on the symposium on "Joint Design and Development of Library Systems". The major result of the symposium was a plan whereby in return for the funding necessary to support meetings of an informal communications among a small project team of individuals working in different library systems currently in the process of mechanization of some clerical process, the team would put their results -- systems design, computer programs, operations manuals -- on deposit for use by others. A final design and implementation report would also be written. The program specifications, general features of it, and operation and initiation of the project are discussed in detail. Key issues are presented with a brief characterization of the various possible answers as well as the consensus of the group concerning each. (Author/CM)