A service where a legacy application or service already exists.

与已经存在的遗留应用程序或服务相关的服务。

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Typically a legacy application already exists that provides the core functionality.

通常已经存在提供核心功能的遗留应用程序。

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Part 3 of this series also showed how a legacy application can be surfaced using a top-down approach.

本系列的第3部分还介绍了如何使用自顶向下方法将遗留应用程序作为服务公开。

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This means the core features would need to be repackaged into light application or built from scratch to be accessible by mobile devices and could lead to multiple issues such as version control, file sharing, interfacing with the legacy application apart from security.

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Recently, technology provider IFS Corporation did a survey on ERP users in manufacturing ( Does ERP Mean Excel Runs Production?) Their surprising results showed that new employees (especially under age 40) were very unlikely to take a job with a company if they had to use a complex (usually vendor supplied) interface to a legacy application.

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Just a short while ago, we faced an expensive update of our IBM Lotus Notes legacy e-mail and business application platform.

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