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Legacy system

In computing, a legacy system is an old method, technology, computer system, or application program, "of, relating to, or being a previous or outdated computer system", yet still in use. Often referencing a system as "legacy" means that it paved the way for the standards that would follow it.

Legacy, Applications, Standards & Technology

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Improvements on legacy software systems

Application retirementMiddlewarePrint serverRich Text Format (RTF)PostScript
12 related topics

Overview

ComputingComputer systemApplicationSource codeObsolete
45 related topics

Additional uses of the term legacy in computing

Operating systemsSoftware maintenanceAn advantage to nobodyComputer mainframeN-tier
8 related topics

Problems posed by legacy computing

SoftwareHardwareEmulationComairX86
7 related topics

Topics to explore

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Overview

Problems posed by legacy computing

Improvements on legacy software systems

NASA example

Perspectives on legacy code

Additional uses of the term legacy in computing

Brownfield architecture

Alternative view

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Map overview Semantic statistics

Legacy system

Nodes95
Edges94
Triples113
Avg. degree1.98
Density0.021053
Components1

How this topic connects Entity context

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Legacy system

Top relations

related to Further reading · 40
Legacy system → Adam, Archived, Assess Heritage Systems, Bibcode, Bound To Fail, CIO Magazine, Comair's Christmas Disaster, Control Design Magazine, Danny Budzinski, Digital Computer, Directions, Early Phases, Enterprise Systems Journal, Grimson, Hein, How, IEEE Software, Issues, January, Jim McGee
related to Problems posed by legacy computing · 17
Legacy system → Budgetary, CEO, Comair, CPUs, Due, GB, However, If, Integration, IPv4, Legacy, Once, ROI, Some, There, These, This
related to NASA example · 15
Legacy system → According, Andreas, For, Hein, However, Munich, NASA's, Otherwise, Replacement, Space Shuttle, Technical University, The, These, This, Thus
related to Improvements on legacy software systems · 12
Legacy system → John McCormick, Most, PC, PC/Windows, PostScript, Printing, Rich Text Format, RTF, The, This, Web-based, Where
related to overview · 7
Legacy system → Backward, By, In, It, Legacy, The, While
related to External links · 4
Legacy system → Legacy, Media, Wikimedia Commons, Wiktionary-logo-en-v2
related to Alternative view · 3
Legacy system → Bjarne Stroustrup, Dot, There
related to Additional uses of the term legacy in computing · 2
Legacy system → For, The
related to Brownfield architecture · 2
Legacy system → Brownfield, Programmers
is a · 1
Legacy system → old method

Important terminology Word statistics

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Important terminology

legacy systems system software may code hardware new often use also computer term application used older longer example business technology

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Legacy systemis aold method0.90text
return on investment challenges or vendor lock-ininstance ofthe decision to keep an old system may be influenced by economic reasons0.80text
the inherent challenges of change managementinstance ofthe decision to keep an old system may be influenced by economic reasons0.80text
or a variety of other reasons other than functionalityinstance ofthe decision to keep an old system may be influenced by economic reasons0.80text
the TOPS database.The way that the system works is not well understoodinstance ofand systems0.80text
trackinginstance ofsecondary functions0.80text
reporting of user activity and/or automatic updating that createsinstance ofsecondary functions0.80text
developmentinstance ofThese capabilities must be integrated into various software life cycle phases0.80text
implementationinstance ofThese capabilities must be integrated into various software life cycle phases0.80text
usageinstance ofThese capabilities must be integrated into various software life cycle phases0.80text
or maintenanceinstance ofThese capabilities must be integrated into various software life cycle phases0.80text
Legacy systemrelated to Additional uses of the term legacy in computingThe0.60section

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