Since the first edition of this volume was published in 1962, new terms have entered the lexicon of labor relations practitioners, established terms have taken on new meanings, and others seem to have vanished. The revision brings descriptions into conformity with the matters described. New terms enter from at least three sources. The first source is the practitioner who introduces a term that catches on. Academics have been another source of change; and finally, changes in public policy have engendered new jargon. (Author/MLF)