As discussed in the previous chapters, the premises of this book may be summarized as follows. First, computers that host library systems should be used at their maximum level of effectiveness, which generally is significantly greater than found in those functions supplied by a turnkey vendor. These maximum levels should be determined by (1) the needs and specialties of the library, (2) the availability of expertise to develop the system, and (3) the characteristics of the computer itself. To achieve the desired level of development, it must be added, requires a high degree of resident competency in computer literacy and computer science.