4 Lessons for Modern Software Developers from 1970s Mainframe Programming
Is 8 GB RAM cramping your style? Try writing headless programs that run in an 8 MB virtual machine, where it costs a fortune each time a program has a non-terminating loop. Current programmers should adopt several attitudes that early mainframe developers considered an essential part of their skillsets.
https://insights.hpe.com/articles/4-lessons-for-modern-software-developers-from-1970s-mainframe-programming-1709.html