IBM Cross System Product

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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. CSP was composed of two products:

  • Cross System Product/Application Development (CSP/AD) - development environment.
  • Cross System Product/Application Execution (CSP/AE) - runtime environment.

CSP version 3 was released in 1986 with extended functions:[2]

The 1987 SAA announcement cast doubt on IBM's commitment to CSP – it "wasn't silent on CSP; it dismembered it.".[3]

The last version of CSP, version 4.1, went out of support at the end of 2001.

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." In 1996 this product was again renamed to VisualAge Generator.[1] VisualAge Generator was withdrawn from service in 2009 and succeeded by Rational Business Developer.[5]

See also[edit]


  1. ^ a b Choquette, Steve. "VisualAge® Generator – Past, Present & Future" (PDF). Retrieved February 6, 2013. 
  2. ^ Babcock, Charles (September 15, 1986). "IBM powers up DBMS application development tools". Computerworld. Retrieved February 10, 2013. 
  3. ^ Babcock, Charles (April 6, 1987). "IBM uncorks SAA genie". Computerworld. Retrieved February 10, 2013. 
  4. ^ Fogarty, Kevin (September 26, 1994). "IBM gets the team spirit with apps tool". Network World. Retrieved February 10, 2013. 
  5. ^ IBM Corporation. "VisualAge Generator". Retrieved February 6, 2013.