This booklet provides a detailed description of the computerization of the library of MMI Preparatory School, a private, non-sectarian college preparatory school in Pennsylvania for students in grades 7 through 12. Each of the following functions is investigated: (1) catalog card production; (2) online reference services; (3) circulation; (4) word processing; (5) graphics; (6) circulation of software; (7) circulation of hardware; (8) evaluations of hardware and software; (9) building the collection of computer reference materials; (10) library skills instruction; (11)) interlibrary loan services; (12) use of word processing to produce bibliographies; (13) use of database management programs for library management; and (14) a workshop for teachers. Recommendations are provided for others who may wish to emulate all or parts of the program, including a detailed time and cost analysis chart. (Author/CGD)