What is "Grey Literature?" One librarian has described it as "the unpublished, non-commercial, hard-to-find information that organizations such as professional associations, research institutes, think tanks, and government departments produce."
Though is it produced by practitioners and researchers in the field, grey literature is not considered scholarly
In the future, grey literature will gain even more prominence. "In a world in which free trade and instantaneous communication have eliminated many of the barriers to information flow, grey literature is gaining greater importance as a source of information for much of the world's population (Weintraub)."