IT
Legacy system
An established system that remains in service despite its age or technology.
Plain English
An older system still doing essential work, usually harder to change than to leave alone.
If you’re new here
Often the most important systems in the building. The people who understand them are frequently close to retiring, which is the actual risk.
What they probably mean
“It works, nobody remembers how, and replacing it would take years.”
Interpretation offered as humour, not authoritative guidance.
Seen in the wild
“The data still lives in a legacy system that predates the branch.”
Translate this sentence →Bureaucracy level
Easy · 2/5
How much government-speak this phrase carries. Playful indicator, not a judgement of anyone using it.
Related terms
Was this explanation helpful?