An outdated software system that is still in use, often because it is critical to business operations, but which may no longer be supported or scalable.
A legacy system is like an old car—it still runs and gets the job done, but it’s expensive to maintain, and parts are hard to find.
A bank continuing to use a decades-old mainframe system for transaction processing, despite newer alternatives being available.
Legacy systems can become costly and difficult to maintain, and they may pose risks such as security vulnerabilities and lack of compatibility with modern technologies.
While legacy systems may still perform essential functions, they can hinder innovation, increase operational costs, and pose security risks.
Regularly assess the risks and costs associated with legacy systems; plan for eventual migration; ensure security updates are applied.
Delaying migration until the system fails; neglecting security updates; underestimating the complexity of replacing a legacy system.
Maintenance costs, system uptime, security incident frequency.
API gateways for integration, cloud migration tools, modernization platforms like AWS Mainframe Modernization.
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