Reviews research on how people use mental models of images in information retrieval. Discusses cognitive and social processes that give rise the visual models shaped by indexers and searchers. Examines the representation of objects and shapes in visual mental models and how both content-based and concept-based indexes capture aspects of these…

History, development, evaluation, and problems of computerized biomedical information systems, with emphasis on the National Library of Medicine and MEDLARS. (LS)

Computer vision offers a variety of techniques for searching for pictures in large collections of images. Appearance methods compare images based on the overall content of the image using certain criteria. Finding methods concentrate on matching subparts of images, defined in a variety of ways, in hope of finding particular objects. These ideas…

Considers the value of published subject bibliographies in helping to winnow the amount of retrieved information from electronic catalogs and indexes based on an information search of the interdisciplinary field of play and leisure. A case study compares the process of developing two bibliographies about play and leisure. (Author/LRW)

Compares traditional cataloging to Web-based. Discusses intellectual-access issues as they apply to reference services today, and outlines deficiencies in traditional cataloging, and corresponding attributes of Web-based intellectual access. Notes ways that catalogers and public-service librarians can address these issues. (Author/AEF)