Legacy systems are older computing software or hardware that continue to be used by an organization, often because they still perform necessary functions that newer technologies have not adequately replaced. These systems can be decades old and are usually incompatible with modern software and hardware architectures. They often present challenges in terms of security vulnerabilities, high maintenance costs, and difficulty in integration with newer systems. Despite these challenges, legacy systems may contain valuable data and have specialized features that are critical for a business operation. As a result, organizations frequently face the complex task of balancing the need to maintain these systems with the imperatives of updating to newer, more efficient technologies.