After 25 years of service, this professional text has been updated in line with developments in the field of library science. Since the seventh edition of this standard text was published in 1985, the have been changes in virtually every area of bibliographic control. "AACR2 Revised" (AACR2R) has been implemented; new editions of or supplements to LCSH, LC classification, and DDC, and "Sears" have appeared; OCLC has adopted the PRISM format; and networking and online catalogues have become a way of life. Taylor addresses these and other changes in this edition. Consequently, many chapters of this text are entirely new, such as "Cataloguing in Context" and "Subject Arrangement of Library Materials", or fully revised such as "Development of Cataloguing Codes", which has been expanded to show the continuity in the development leading to publication of AACR2R. Two appendices have been added: an introduction to USMARC format and instructions for typing catalogue cards, including a detailed analysis of the puctuation and spacing to be used when conforming to the International Standard Bibliographic Description (ISBD).