分布式多层系统由客户端应用程序，应用程序服务器和数据库服务器层次构成。其关键在于引用了应用程序服务器，它改善客户机/服务器结构延展性，这对于软件开发，以及客户端的维护都有积极的效应。概述分布式多层体系结构，介绍了用Delphi开发分布式多层MIS系统的方法。%Distributed-tier structure is included to Client application program Application program sever and Database sever. The Client application program is more important, it can davance property for C/S system. This paper summaries the distributed-tier structure, and briefly introduces the method of developing distributed-tier MIS in Delphi.
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