This is the genealogy of the programming language Algol:

Algol was first known as Algol 58 in year 1958.
Then it begat Algol 60 in year 1960.
Then it begat PL/I in year 1964.
Then it begat Simula in year 1964.

This genealogy is brought to you by the Programming Languages Genealogy Project. Please send comments to thbz.