This paper reviews 19th and 20th century English-language literature dealing with the user friendliness of library catalogs and cataloging. Sections cover literature on: (1) the need for catalogs and the possibility of substituting subject bibliographies for the subject catalog; (2) user needs and the dichotomy between designing catalogs based on…

Suggests new method of external distribution called tree partitioning that involves use of binary tree to split incoming file into successively smaller partitions for internal sorting. Number of disc accesses during a tree-partitioning sort were calculated in simulation using files extracted from British National Bibliography catalog files. (19…