Legacy System

A legacy system refers to outdated software or hardware that continues to operate in an organization, even though newer alternatives are available. These systems are often built on outdated technologies, are no longer actively supported by vendors, and may pose security and scalability challenges. Despite their age, legacy systems often perform mission-critical functions, making replacement or upgrade a complex and risky process.

Common examples include enterprise software, operating systems, or databases that were developed decades ago. Businesses typically retain legacy systems due to cost, integration complexity, or regulatory dependencies. Maintaining them requires custom support, modernization strategies, or partial migration to cloud-based platforms.

Identifying technical debt and planning a smooth transition is key to managing legacy infrastructure effectively. Legacy systems remain a major concern in industries like finance, healthcare, and government, where stability and compliance are vital.