Information Processing Language


Information Processing Language

[‚in·fər′mā·shən ′prä·ses·iŋ ′laŋ·gwij] (computer science) IPL

Information Processing Language

(IPL) Said to be the first list-processing language, also thefirst language to support recursion. Written by AllenNewell, J.C. Shaw and H. Simon at Carnegie ca. 1956. It wasvery low level.

Versions: IPL-I (never implemented), IPL-II (1957 forJOHNNIAC), IPL-III (existed briefly), IPL-IV, IPL-V (1958,for IBM 650, IBM 704, IBM 7090, many others. Widelyused), IPL-VI.

[Sammet 1969, pp. 388-400].

["Information Processing Language-V Manual", A. Newell ed, P-H1965].