Outlines the kinds of contributions picture postcards can make to library or museum materials, particularly to historical files as documentation of certain aspects of history. Various methods for putting collections of cards in order are described, from general policies concerning use and disposal, to sorting, indexing, and housing. (Author)

Recounts the development of a slide storage and retrieval system at the Philip Morris Research Center in Richmond, Virginia and describes the methods used to classify and access slides in the collection. A reference list and three appendices accompany the text. (JL)