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legacy system
(redirected from Legacy technology)

    Also found in: Wikipedia, Hutchinson 0.04 sec.

legacy system

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

legacy system [′leg·ə·sē ‚sis·təm]
(computer science)
A computer system that has been in operation for a long time, and whose functions are too essential to be disrupted by upgrading or integration with another system.
(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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The theory is that the existing investment in those systems can yield further returns, and the legacy technology framework is prevented from acting as an inhibitor of organisational change.
Legacy worth keeping. (IT News) by Software World
Built on extensible open industry standards that enable the rapid implementation of agile and scalable Web-based solutions, the SunConnect architecture is engineered to maximize the use of differing technologies in order to minimize costs associated with altering existing legacy technology.
SUN MICROSYSTEMS PLATFORM PROVIDES SOLID FOUNDATION FOR WIRELESS ... by EDP Weekly's IT Monitor
This is the first year that Infosecurity Europe has introduced a unique educational and networking forum designed specifically to address the key inhibitors - such as future-proofing, interoperability, building on legacy technology, best of breed or integrated solutions and cost of application - faced when implementing Information Security projects.
Passlogix CEO to Speak at Infosec 2007 Forum by Business Wire
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