1974年随着计算技术多系统处理的发展,把电子计算机划分为微小型、小型、中型、大中型、大型、极大型、超大型和巨型8种;但因电子计算机“大型化”的跃进,这种分类法已不大适应发展的需要.在商业场合,则按电子计算机的价值和租用费,分为小型的,每台40万美元以下(每月租用费8千美元以下);中型的,每台40—170万美元(每月租用费0.8—4万美元); In 1974, with the development of multi-system processing in computing technology, electronic computers were divided into 8 categories: micro, small, medium, large, medium, large, very large, super large, and huge; however, due to the leap of “larger” computers, This type of taxonomy is no longer adapted to the needs of development. In commercial settings, it is divided into small ones according to the value of computers and rental fees, and each is less than US$400,000 (the monthly rent is less than US$8,000); medium-sized , each of 40-170 million US dollars (monthly rental fee of 0.8-40,000 US dollars);