On Retrieval System Theory

London, England: Butterworths. Very Good+ in Very Good+ dust jacket. 1965. 2nd Edition. Hardcover. 0408280506 . Graphs; This book is in Very Good+ condition and has a Very Good+ dust jacket. The book and its contents are in clean, bright condition. The text pages are clean and bright with the exception of several pages towards the end that appear to have been misfed during printing and are wrinkled. The dust jacket has some edge wear, rubbing and wear. "The traditional methods of storing information so that it may later be recalled are classification and indexing. The index has been in the form of subject headings, either printed in sequence on a page or typed on cards which are filed in sequence. During the past few decades new forms of index have come into use: cards on which subjects have been coded in patterns of holes, and, experimentally at least, paper tape, magnetic tape, magnetic drums and disks and photographic film. Such indexes are mechanically searched, and their development has been distinct from - almost in opposition to - traditional forms." This book (updated with new information regarding the fast changes in this area of computer science, especially in the 1960's) discusses the very wide open field of categorizing, indexing and retrieving information from computer systems with the varying theories described and discussed. .