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Illustrations Author's Preface List of Abbreviations Theory of Information Retrieval Systems Introduction Features of an Information Retrieval System Derieved Indexing 1: Printed Indexes Derieved Indexing 2: Online Searching Assigned Indexing 1: Semantics Assigned Indexing 2: Syntax Pre-Coordinate Indexing Systems Alphabectical Subject Headings: Cutter to Lynch Systematic Arrangement General Classification Schemes Notation Alphabetical Index Organization Some Recent Developments in Classification PRECIS Kinds of Pre-Coordinate Index Pre-Coordinate Indexing Languages Introduction The Dewey Decimal Classification The Universal Decimal Classification The Bibliographic Classification The Colon Classification The Library of Congress Classification Subject Headings used in the Dictionary Catalogs of the LC SEARS List of Subject Headings Post-Coordinate Indexing Systems Manual Systems Computer-based Systems Post-Coordinate Indexing Languages Science and Technology Social Sciences Evaluation of Information Retrieval Systems The Evaluation of Information Retrieval Systems Index Author Index Subject Index Back Cover