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legacy system
(redirected from Legacy systems)

    Also found in: Wikipedia, Hutchinson 0.03 sec.

legacy system

An older computer system such as a mainframe or minicomputer. It may also refer to only the software (see legacy application).

(jargon)legacy system - A computer system or application program which continues to be used because of the cost of replacing or redesigning it and often despite its poor competitiveness and compatibility with modern equivalents. The implication is that the system is large, monolithic and difficult to modify.

If legacy software only runs on antiquated hardware the cost of maintaining this may eventually outweigh the cost of replacing both the software and hardware unless some form of emulation or backward compatibility allows the software to run on new hardware.


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When working with legacy systems, Morton said, Web services are a convenient way for insurers to bring in applications that can be integrated into existing applications, as well as work with back-end legacy systems.
More insurers embracing Web services in past year by Chordas, Lori / Best's Review
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DCS migration solutions available with Invensys by Solutions - for People, Processes and Paper
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