From The Free On-line Dictionary of Computing (19 January 2023):
ALGOL 58
IAL
International Algebraic Language
<language> An early version of ALGOL 60, originally known as
"IAL".
Michigan Algorithm Decoder (MAD), developed in 1959, was
based on IAL.
["Preliminary report - International Algebraic Language", CACM
1(12):8, 1958].
[Details? Relationship to ALGOL 60?]
(1999-12-10)