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.   This paper discusses the POP-2 language and Multipop time-sharing system developed during the second half of the 1960s. POP-2's expressiveness spanned numeric and symbolic programming and supported experiments in logic of programming languages (by Boyer and Moore) and programming language concepts (for example, Michie's memoisation). The paper also discusses how the goals of POP-2 might be achieved in a successor language.

POP, A Broad-Spectrum Programming Language, 1967–2002