Fortran
The first major breakthrough in programming languages, introducing portability by allowing code to be written in human-natural terms, primarily for engineers and physicists.
Videos Mentioning Fortran

Yann LeCun: Deep Learning, ConvNets, and Self-Supervised Learning | Lex Fridman Podcast #36
Lex Fridman
An older programming language mentioned as being used for implementing neural networks before the advent of Python or MATLAB.

Bjarne Stroustrup: C++ | Lex Fridman Podcast #48
Lex Fridman
The first major breakthrough in programming languages, introducing portability by allowing code to be written in human-natural terms, primarily for engineers and physicists.

Travis Oliphant: NumPy, SciPy, Anaconda, Python & Scientific Programming | Lex Fridman Podcast #224
Lex Fridman
An early programming language for scientific and engineering applications, used by Travis and from which he leveraged many pre-written routines for SciPy.

Brendan Eich: JavaScript, Firefox, Mozilla, and Brave | Lex Fridman Podcast #160
Lex Fridman
A programming language that Eich avoided by being in the science department, as opposed to engineering which still used card decks.