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{{blockquote|An FP system is based on the use of a fixed set of combining forms called functional forms. These, plus simple definitions, are the only means of building new functions from existing ones; they use no variables or substitutions rules, and they become the operations of an associated algebra of programs. All the functions of an FP system are of one type: they map objects onto objects and always take a single argument.<ref name="Backus 1977"/>}}
FP itself never found much use outside of academia.<ref name="p21">{{cite web|last1=Hague|first1=James|title=Functional Programming Archaeology|url=http://prog21.dadgum.com/14.html|website=Programming in the Twenty-First Century|date=December 28, 2007}}</ref> In the 1980s Backus created a successor language, [[FL (programming language)|FL]]
== Overview ==
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