+A **Legacy System** is an aging [Software](/wiki/software) application or computing system still in use, often because it performs a critical function. Despite its age, it continues to operate, sometimes requiring specialized [Maintenance](/wiki/maintenance) or posing challenges for [Modernization](/wiki/modernization).
+## See also
+- [System](/wiki/system)
+- [Technology](/wiki/technology)
+- [Development](/wiki/development)
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