. . . . . . . . . . "Z39.50 is an information retrieval protocol. This article gives a functional overview of the protocol itself and the standards background, describes some European initiatives which make use of it, and outlines various issues to do with its future and acceptance. It is argued that Z39.50 is a crucial building block of future distributed information systems but that it needs to be considered alongside other protocols and services to provide useful applications."@en . . . . "Program--Vol. 30, no. 1"@en . . "Towards distributed library systems Z39.50 in a European context"@en . . . .