As an aid to library administrators, professional staffs, and officials in making comparative evaluations of their own organization's position descriptions and in developing new position descriptions and classification specifications, this document describes 72 library-related positions and divides them into two major groups of classifications: ten library classifications and five non-library classifications. The library classifications range from Library Director to Library Aide; the non-library classifications cover Administrative Assistant III through Monitor. Examples of job titles are Film Projectionist, Bindery Clerk, Circulation Control Supervisor, Graphic Designer, Young Adult Librarian, Volunteer Assistance Coordinator, Exhibits Librarian, Community Services Librarian, Librarian for Srvice to the Spanish Speaking, and Coordinator of Adult Services. The position descriptions developed in this study follow the standard pattern of listing the various duties required in the position; a job summary and a responsibility relationship statement are also included. In order to determine the essential make-up of the position described, the percentage of time spent on each duty is indicated and the duties are ranked by this percentage. Two organizational charts and an index to job titles are provided. (Author/JD)