That's funny - I am currently working on a web app to GUI-ify the green screen for my company's IBM i OS on a similar Power8 system. They love the green screen but this was the easiest way to reduce the amount of manual entry we're doing for a specific 3rd party application we run on it.

A different tool I made ran in the PASE [1] environment on the same system -- compiling & running C++ in IBM's AIX runtime environment. Really interesting experience.

[1]: https://www.ibm.com/docs/en/i/7.3?topic=programming-pase-i