Information Processing Language

(IPL) Said to be the first list-processing language, also the

first language to support recursion. Written by Allen

Newell, J.C. Shaw and H. Simon at Carnegie ca. 1956. It was

very low level.

Versions: 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.

[Sammet 1969, pp. 388-400].

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

1965].

(1994-11-04)