Academic/Administrative Space
        Space assigned to departments and organizational units whose functions are  instruction, research, public service, academic support, student services,  institutional support, operation and maintenance of physical plant, and  certain auxiliary enterprises.

Supplementary Space
        Space assigned to departments and organizational units whose functions are  related to auxiliary enterprises, independent operations or non-institutional  activities, hospitals, and residential activities.

Total Assignable Area
        The sum of all areas on all floors of a building or addition assigned to,  or available for assignment to an occupant or specific use, except for spaces  defined as building service, circulation, mechanical, or structural (or  Academic/Administrative + Supplemental).

Gross Square Feet
        The sum of all areas on all floors of a building or addition included  within the outside faces of exterior walls, including floor penetration areas.  This figure should include spaces coded as nonassignable, such as building  service, circulation, mechanical, structural, and all assignable areas. Open  areas such as parking lots, playing fields, courts and light wells, or  portions of upper floors eliminated by lobbies or rooms that rise above  single-floor ceiling height should be excluded.

Non-assignable Area
        The sum of all areas on all floors of a building not available for  assignment to an occupant or for specific use, but necessary for the general  operation of a building (hallways, public restrooms, stair wells, elevators,  mechanical areas, custodial & telecommunication closets).

Net Area
        The sum of all areas on all floors of a building either assigned to, or  available for assignment to, an occupant or specific use, or necessary for the  general operation of a building (total assignable + non-assignable).