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JSP in Perspective

  • Michael Jackson

Abstract

Jackson Structured Programming (JSP) is a method of program design. Its origins lie in the data processing systems that grew up in the 1960s, when reliable, relatively cheap and adequately powerful computers first became generally available. The fundamental abstraction in JSP is the sequential data stream. Originally, this abstraction was inspired and motivated by the sequential tape files that characterised data processing in the 1960s, but it quickly became clear that it had a much wider applicability. Today the JSP design method is valuable for applications including embedded software, processing streams of EDI messages, handling network protocols and many others.

JSP arose from efforts by a small group of people in a data processing consultancy company to improve their programming practices, and to make their programs more reliable and easier to understand and to modify. In 1971 it became the core product of a very small new company, Michael Jackson Systems Limited, which offered development services, training courses, consultancy, and — from 1975 — software to support JSP design of COBOL programs. The name JSP was coined by the company’s Swedish licensee in 1974. In the commercial world, IBM had appropriated the name ‘Structured Programming’ in the early 1970s, and Yourdon Inc. started offering courses in ‘Structured Design’ around 1974. A distinctive name was a commercial necessity. It was also technically appropriate to choose a distinctive and proprietary name: the JSP method was very different from its competitors.

Keywords

Input File Program Structure Read Operation File Structure Data Processing System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Michael Jackson
    • 1
  1. 1.LondonUK

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