9 laboratory distribution switchboards, plug and jack control panels, and cordless area control panels comprising electrical switches and analog or digital meters for the purpose of supplying regulated AC and DC power to be used by students in conducting experiments; current curb limiters, namely voltage surge protectors and supressors, color television troubleshooting training simulator comprising television picture tubes, electronic circuit boards, and fault switches that produce operating malfunctions for use in training television service technicians; service outlets, namely electric receptacle plates and electric switch plates; diode-protected multi-range and unprotected multi-range ammeters, voltmeters, galvanometers; AC-DC power supplies; electric and electronic circuit simulators comprised of integrated circuits and printed circuit boards for use in training students in the applications of electronic and electrical circuits