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Jackson Structured Programming or JSP is a method for structured programming based on correspondences between data structure and program structure. It was originally developed in the 1970s by IT consultant Michael A. Jackson in order to improve the general standard of COBOL programming, although it is just as applicable to C or to Lisp for that matter. Although it imposes a structure upon a program which improves its modifiability and maintainability, the structure is rather different from the type of structure advocated by Wirth, Dijkstra, et al.
