Abstract: A computer system is disclosed for preparing a complete set of architectural specifications for constructing a building, including, if desired, sets of instructions that will be used by personnel during preparation of construction drawings and during construction. A specifier uses brief symbolic characters representative of individual phrases from a large information repository called a Master Phrase Catalog, to mark decisions and phrase selections in code on an order form designed to facilitate the specifier's task. The information in the Master Phrase Catalog includes construction materials, techniques, reference information, testing and industry standards which are correlated with instructional information and work assignments for various groups of people. The specifier uses only a limited number of commands to completely specify a project.