Modifications and changes introduced by users since the introduction of the Uniterm System of Coordinate Indexing by Mortimer Taube in 1952 are discussed in this paper. Many of these modifications and changes seem to represent a movement toward conventional specific subject heading and indexing techniques in the choice of entries, although this is obscured by the terminology. The authors suggest that conventional terminology be used where it is applicable, that the literature has largely concerned the method of choice of subject entry words rather than the principle of bibliographic coordination, and that users of the system might have profited by more direct comparison of their work with conventional techniques derived from Cutter's work of 1876.