MAD CAD (Rockville, MD) is a state-of-the-art, subscription-based reference database online, containing building codes, knowledge-based design solutions and, guidelines to meet the codes. MAD CAD, located at www.madcad.com, provides access to cross-referenced collections of building, electrical, mechanical, plumbing, fire, and maintenance codes from BOCA, SBCCI, ICBO, ICC, and NFPA.