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本文作者从参加香港某货运公司管理信息系统（ＣＴＣＭＩＳ）设计开发中所遇到的新老系统转换的问题出发，分类地探讨了企业信息系统建设过程中对于企业原有的老系统，或称遗留系统的处理办法。本文提出了处理遗留系统的一般原则。根据对遗留系统继承的程度，总结了４种处理的模式。我们认为本文具有较大的实践指导意义。
In this paper, the author starts from participating in the transition of old and new systems encountered in the design and development of a freight forwarding company management information system (CTCMIS) in Hong Kong, and discusses in a classification way the existing old systems of the enterprise during the construction of an enterprise information system, System approach. This article presents the general principles for handling legacy systems. According to the extent of legacy system inheritance, summed up the four kinds of processing mode. We think this article has great practical significance.