What is legacy?

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The use of the term legacy in the IT world relates to software or hardware that has been superseded but is difficult to replace.

Typically legacy systems are hard to replace because they have been used for mission critical applications, so replicating them can be extremely time consuming and difficult, while there is also the risk of downtime, which is not appealing to businesses as it can seriously affect their operations.

Legacy applications and data are those that have been inherited from languages, platforms, and techniques earlier than current technology.

 

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