Prepared as a guideline for reports on facilities in square feet quantities in response to the Higher Education General Information Survey and other requests for facilities data by the Office of Education and other Federal and non-Federal agencies, facilities terminology is defined and numerically classified. Building area and room classification and inventory processes are described in detail. Building area is given six classifications--(1) gross area, (2) net assignable area, (3) custodial area, (4) circulation area, (5) mechanical area, and (6) construction area. The area classifications include definitions, descriptions, basis for measurement, limitations, and a graphic illustration of each term. Assignable and unassigned spaces are numerically coded by organizational unit, function, and type of room. In the type of room section inventory items are separately defined and described plus limitations and exclusions concerning each term. The final section contains the required report forms plus completion instructions. (NI)