Kansai Electric Power is to begin marketing an expert system development tool called Knowledge Acquisition and Arrangement Support System, which is designed for efficient development of fault diagnosis systems: it is claimed to reduce to a quarter the effort required to develop knowledge-based systems compared with earlier products, and will be pitched at Nippon Telegraph & Telephone and electrical and electronic manufacturers; the system was developed with the help of the Toyo Information Systems software and is available on the IBM 5550 and the NEC 9800 personal computer series for around $3,900.