Introduction. In the context of methodological problems of bibliometrics, we consider the concept of the object of bibliometrics, viz. a document. In regard with the author’s view that the document is also an integral component of the objects of scientometrics and informetrics, the share of this component being very significant, it seems important to attempt to review some of the evolution that the concept of a “document” has undergone since the dictionary definition of 1975, as the perception of the document as the object of bibliometrics did not incorporate the changes that the concept of a document has undergone irrespectively of its application to “metric” research.Materials and methods. Analytical interpretation of scientific literatu...