Most of us are familiar with the Dewey Decimal System used to catalogue and organize books in libraries. Think of MasterFormat as the equivalent system for the building construction industry. A product of the Construction Specifications Institute (CSI) and Construction Specifications Canada, MasterFormat organizes specifications for commercial and institutional building projects. Originally, the system contained 16 Divisions, but in November 2004, MasterFormat expanded to 50.
See also: CSI