Provides the information required for interacting with the OCLC/LSP Authority File. This guide describes the searching, editing, record creation, and record contribution facilities of OCLC's implementation of the Linked Systems Project (LSP), which links cooperating computer systems. The introductory chapter describes NACO and the LSP project supported by CLR, LC, RLG, WLN and OCLC to collaboratively build a national authority file system.