legacy system


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Related to legacy system: Legacy software

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.

legacy system

(jargon)
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.

legacy system

An older computer system such as a mainframe or minicomputer. It may also refer to only the software (see legacy application).
References in periodicals archive ?
At their core, they're the same legacy systems designed to be deployed on customers' premises to handle financial accounting--and not much more.
* Create a framework of imperative questions and quantifiable answers that can improve the decision maker's ability to pinpoint which legacy system opportunities for reuse stand the greatest chance of success.
As for legacy systems, most agreed they will not be eradicated from the insurance industry over the next five years, but one CIO made an interesting point: Insurers have avoided the replacement issue by adding on to their legacy systems in an attempt to modernize the older tools.
Human service agencies spend valuable time and money trying to squeeze what they can out of legacy systems that are, in fact, putting the squeeze on already scarce taxpayer dollars.
This article explains how to apply the ABAP programming language to your Legacy System Migration Workbench (LSMW) objects in order to meet your business requirements.
Ashwood proposed their legacy system be replaced with an IBM xSeries 3500 with a 3 GHz, Quad-Core processor, 9GB of memory, mirrored disks, and Microsoft Small Business Server 2008.
The total cost of ownership for the legacy system was unacceptably high, in part because functions and processes that were hidden in the patches and solution "band-aids" of the antiquated, poorly documented legacy system added to the cost of operation.
"The Telex Legacy system is essential in a wireless network system," Gubser said.
There was some initial concern over user adoption, since Global had been doing things the old way for a very long time--there were legacy processes to go along with the legacy systems. Fortunately, ease of use and greatly improved functionality quickly won over workers.
When his school blended several legacy systems, Sift turned to dbaDIRECT, so staffers could focus on infrastructure issues rather than spend much of their time on data cleansing and other routine tasks.
The hardware provides full backwards software compatibility with the company's previous APC control cabinets so that profile control upgrades can easily be made to any legacy system from the company.