This paper is an introduction to the fundamentals of the art (including architecture) slide library, with some emphasis on basic procedures of the science slide library. Information in this paper is particularly relevant to the college, university, and museum slide library. Topics addressed include: (1) history of the slide library; (2) duties of the slide librarian; (3) selection, acquisition, and storage of slides; (4) cataloging and classification of slides; and (5) guidelines for judging the quality of slides. (Author/AP)