Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Legacy Transformation, or legacy modernization, refers to the rewriting or porting of a legacy system to a modern computer programming language, software libraries, protocols, or hardware platform. Legacy transformation aims to retain and extend the value of the legacy investment through migration to new platforms. A legacy code is any application based on older technologies and hardware, such as mainframes, that continues to provide core services to an organization. Legacy applications are frequently large and difficult to modify, and scrapping or replacing them often means re-engineering an organization's business processes as well. However, more and more applications that were written in so called modern languages like java are becoming legacy.

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