IBM
International Business Machines Corporation (using the trademark IBM), nicknamed Big Blue, is an American Multinational corporation, multinational technology company headquartered in Armonk, New York, and present in over 175 countries. It is ...
's Cross System Product (CSP) was an
application generator
An application server is a server (computing), server that hosts applications or software that delivers a Business software, business application through a communication protocol. For a typical web application, the application server sits behind th ...
intended to create online systems on IBM's mainframe platforms. Introduced in 1981,
CSP consisted of a set of
source code
In computing, source code, or simply code or source, is a plain text computer program written in a programming language. A programmer writes the human readable source code to control the behavior of a computer.
Since a computer, at base, only ...
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:
*
DB2 support in
CICS
IBM CICS (Customer Information Control System) is a family of mixed-language application servers that provide online business transaction management, transaction management and connectivity for applications on IBM mainframe systems under z/OS ...
/OS/VS and
MVS
Multiple Virtual Storage, more commonly called MVS, is the most commonly used operating system on the System/370, System/390 and IBM Z IBM mainframe computers. IBM developed MVS, along with OS/VS1 and SVS, as a successor to OS/360. It is unr ...
/
TSO environment
*
SQL/DS support in
VSE and
VM/SP
VM (often: VM/CMS) is a family of IBM virtual machine operating systems used on IBM mainframes System/370, System/390, zSeries, System z and compatible systems, including the Hercules emulator for personal computers.
Design
The heart of th ...
environment
*
MVS/XA
Multiple Virtual Storage, more commonly called MVS, is the most commonly used operating system on the System/370, System/390 and IBM Z IBM mainframe computers. IBM developed MVS, along with OS/VS1 and SVS, as a successor to OS/360. It is unr ...
(31bit addressing) support
The 1987
SAA announcement cast doubt on IBM's commitment to CSP – it "wasn't silent on CSP; it dismembered it.".
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 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.
VisualAge Generator was withdrawn from service in 2009 and succeeded by Rational Business Developer.
See also
*
Rational Software
Rational Machines is an enterprise founded by Paul Levy and Mike Devlin in 1981 to provide tools to expand the use of modern software engineering practices, particularly explicit modular architecture and iterative development. It changed its n ...
References
Fourth-generation programming languages
IBM mainframe software
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