Legacy infrastructure refers to outdated or aging technology systems, software, or hardware that may not be compatible with newer technologies or software. Synonyms for legacy infrastructure include outdated infrastructure, antiquated infrastructure, inherited infrastructure, heritage infrastructure, historical infrastructure, traditional infrastructure, and vintage infrastructure. These terms all refer to technology systems that may be old or obsolete, but are still in use due to their historical significance, or due to budget constraints or other practical reasons. Businesses and organizations often struggle to maintain legacy infrastructure, as it can be difficult to find skilled personnel to manage and maintain these systems, or to find replacement parts and components for aging hardware.