IBM's Cross System Product (CSP) was an application generator intended to create online systems on IBM's mainframe platforms.
Introduced in 1981,[1] CSP consisted of a set of source code generators that allowed developers to interactively define, test, generate, and execute application programs.
In 1994, IBM released a successor product called VisualGen[4] which incorporated "the ability to develop client/server applications (particularly the addition of graphical user interfaces (GUIs) to applications), the ability to access data from non-IBM vendors’ data stores, and the ability to execute application in operating environments beyond the mainframe."
[1] VisualAge Generator was withdrawn from service in 2009 and succeeded by Rational Business Developer.
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