Information Processing Language: Difference between revisions

Revision as of 15:12, 23 August 2003

Revision as of 15:13, 23 August 2003

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'''Information Processing Language''' (IPL) was a [[programming language]] developed by [[Allen Newell]], [[Cliff Shaw]] and [[Herbert Simon]] at [[RAND Corporation]] and the [[Carnegie Institute of Technology]] from about [[1956]]. It included features intended to support programs that could perform general problem solving, including lists, associations, schemas (frames), dynamic memory allocation, data types, recursion, associative retrieval, functions as arguments, and generators (streams).

IPL was used to implement two of the first [[artificial intelligence]] programs, by the same authors: the [[Logic Theory Machine]] (1956) and the [[General Problem Solver]] (1957), and probably also their [[chess]] program [[NSS]] (1958).

Several versions of IPL were created: IPL-I (never implemented), IPL-II (1957 for [[JOHNNIAC]]), IPL-III (existed briefly), IPL-IV, IPL-V (1958, for [[IBM 650]], [[IBM 704]], [[IBM 7090]], many others. Widely used), IPL-VI.