The term grey literature refers to a wide range of types of informational material which is made available to the general public by public and private sector organisations whose function is not primarily publishing. Such information includes reports, brochures, guides, dissertations, product information, budgetary data, memoranda, and research findings. A more formal definition is: “That which is produced on all levels of government, academia, business and industry in print and electronic formats, but which is not controlled by commercial publishers”.