This report provides the specifications for a bibliographic format which is a detailed and structured method for recording a number of mandatory and optional data elements in a computer-readable bibliographic record for exchange purposes between two or more computer-based systems. The specifications are designed to permit local designers to devise local procedures and computer programs so that files can be exchanged in either direction with other organizations that may use the Common Communication Format. Differing in only minor ways from the first edition, this second edition is divided into six parts: (1) Introduction, which explains the history of and rationale for the format; (2) Use of the Format; (3) Data Elements; (4) Codes Used in the Data Elements; (5) Examples of Complete Records; and (6) Indexes. The last section contains a list of the data elements and their tags as well as a subject index. (EW)