拟开发一个自动取款系统（参考图1-1），它是一个由自动取款机、中央计算机、分行计算机及柜员终端组成的网络系统。ATM和中央计算机由总行投资购买。总行拥有多台ATM，分别设在全市各主要街道上。分行负责提供分行计算机和柜员终端。柜员终端设在分行营业厅及分行下属的各个储蓄所内。该系统的软件开发成本由各个分行分摊。-To develop an automated teller system (refer to Figure 1-1), which is an automated teller machine, a central computer, branches and teller terminals computer network system. ATM and the central computer from the head office to invest. Head office has a multi-ATM, are located in the city s major streets. Branch branch responsible for providing computers and teller terminals. Teller terminals located in branch banking hall and the various bank branches within their subordinates. The system software development cost-sharing by the various branches.