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What Is an Enterprise Information System?

Enterprise system
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What Is an Enterprise Information System?

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An enterprise information system, or EIS, is a heterogeneous storage and retrieval system for enterprise data. Examples include enterprise resource planning (ERP) systems, customer relationship management (CRM) systems, mainframe transaction processing (TP) systems, other databases, and legacy applications that are not written in the Java programming language. Legacy EISs have typically evolved over a significant amount of time through a significant amount of effort. Replacing these systems is usually not viable, so a mechanism is required to connect to them as is, preferably in a standard, reusable way.

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