This is the third edition of this comprehensive exposition of cataloguing and indexing which has been a standard international text for the past decade. The work has been revised, updated and expanded to take account of the many significant developments in this rapidly evolving field of librarianship over recent years: the 1988 revision of AACR2; the publication of new ISBDs such as that for computer files; the changed format of Library of Congress subject headings; and progress in computer applications (networks and distributed systems, OPACs, integration and the advent of CD-ROM).