PL/I is pronounced PL One - Programming Language One. I worked at IBM, where this language was created, and used it to program in house applications. For IBM software products, we used PL/S - Programming Language/Systems. PL/S is the language the PL/I compiler and runtime are written in. PL/S feels like a very streamlined version of PL/I. The folks who created the APL compiler and runtime worked down the hallway.
PL/I is pronounced PL One - Programming Language One. I worked at IBM, where this language was created, and used it to program in house applications. For IBM software products, we used PL/S - Programming Language/Systems. PL/S is the language the PL/I compiler and runtime are written in. PL/S feels like a very streamlined version of PL/I.
The folks who created the APL compiler and runtime worked down the hallway.
It teaches Fortran IV, the predecessor of Fortran 66.
You have a great collection of books.