The writing of job descriptions is a universal management practice in every type of organization. Whatever the size or type of library, the need exists for written descriptions of every job performed. There are no standard of job descriptions available because work duties differ among libraries. Tasks are grouped differently and jobs are given different titles. The organization of a small library, for example, is quite different from that of the large library having a high degree of specialization. Total work performed in operating different types of libraries is delegated in widely varying ways. This is a fact of librarianship and probably cannot be avoided. The job descriptions presented herein are offered as examples for library directors to use as guidelines in drafting statements to fit their own particular operations. In total, the descriptions attempt to cover most of the major work activities performed in libraries, whether they be in public, college, university, or special libraries. Although the statements were prepared for use in a small college library, they are equally adaptable to any type of library. It is highly recommended that a unique job description be written for every job in every library. Professional management requires the use of such tools in the proper allocation and division of work. (Author)