C&C Systems Research Laboratories, NEC Corporation, Kawasaki, Japan;C&C Systems Research Laboratories, NEC Corporation, Kawasaki, Japan;C&C Systems Research Laboratories, NEC Corporation, Kawasaki, Japan;Computer Engineering Division, NEC Corporation, Fuchu, Tokyo, Japan;Basic Software Development Division, NEC Corporation, Fuchu,Tokyo,Japan;Basic Software Development Division, NEC Corporation, Fuchu,Tokyo,Japan