MANY ORGANIZATIONS RELY ON LEGACY APPLICATIONS HOSTED ON MAINFRAME COMPUTER systems to provide critical information support. They find themselves pressed to integrate the data and business logic of their legacy applications with information systems developed to take advantage of client/server architectures, graphical user interfaces [8], and the new de facto thin client, the HTML browser. As the term application data) frequently with inadequate or absent user and technical documentation. In the 'legacy' implies, these applications have been worst case, only run-time components may remain after the loss of source code. In addition, as organihanded down from a previous generation of develop-zations mature, diminishing numbers of technical ers, often with a long history of adaptation to the personnel with direct knowledge of the application's enterprise. In many cases the large, critical produc-internals remain on staff tion systems referred to as 'legacy' are well-planned.Organizations have responded to the rapid rate of ŵ ell-managed, growing systems, in other cases, the technological advances in desktop computmg and i 'legacy' now exists in an almost exclusively physical graphical user interfaces by adding services using 3S form (that is, a large corpus of program code and newer technologies while retaining legacy applica-2
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