Learn more about ProQuest’s use of library classification systems Written by Michael Olenick, Sr. Content Business Analyst at ProQuest With many different subject classification systems where most are referred to by their acronyms, it is sometimes hard to tell your BISAC from your BIC from your LCSH. Here is a brief overview of some classification systems that are used by our content team. BISAC subjects have been the North American book industry standard for over 25 years.
