I was on a call today that mentioned a blog post by Marianne Bellotti (author book "Kill it with Fire" 🔥) about writing some COBOL on IBM z/OS via ISPF, and it goes into detail about what I tend to condense into "Mainframes work differently than systems most folks are familiar with today."
Datasets, JCL, weird format requirements, and why can't I just create a file!?
And it's funny, I had a good chuckle at "JCL on first glance is a gobbledygook of all caps" 😂
Enjoy! https://medium.com/the-technical-archaeologist/hello-world-on-z-os-a0ef31c1e87f










