Mi zhi lian zhi nan : Mi zhi lian zhi nan= PLC shi zhan zhi nan / Xin li zhi liao zhi nan/ De fang zhi li zhi nan : Ba qian nian zhi lian : Hai wai liu xue zhi nan / Cai yun zhi nan = Bao xian zhi nan/ IBM ruan jian zhi nan 1984/