PDF of the lecture: https://www.eecg.utoronto.ca/~jzhu/csc326/readings/iverson.p...

I found this part remarkable:

> The executable language to be used is APL, a general-purpose language which originated in an attempt to provide clear and precise expression in writing and teaching, and which was implemented as a programming language only after several years of use and development.

This is also how Python started out! I always thought, "Python is so easy for beginners because it is a teaching language." Well, so is APL!