This manual is concerned with the classification systems, codes, and definitions necessary for describing and quantifying building areas in terms of statistical aggregations that are meaningful and useful for planning at all levels of resource allocations. Procedures for collecting higher education building and room data for institutional use, and for compiling these data for interinstitutional exchange and reporting are described. Section 2 outlines general procedures, data collection formats, and data categories for both building and room data. Section 3 focuses on the formats of reports to external agencies and on the compacting and aggregating of institutional building and room data to manageable proportions for system, State, and national purposes. Section 4 deals with the use of facilities-inventory data at the institutional, State, and national levels, and discusses possible linkages of the facilities-inventory data with other data to enhance decisionmaking. Section 5 answers a series of typical questions asked during the field review of this document. Section 6 contains codes and definitions for the categories of building and room data discussed in sections 2 and 3. A glossary is included, as well as a series of drawings illustrating the various categories of floor areas. (Author/MJM)