This page assumes you have a machine (emulated or not) running the VM370 Community Edition OS available. There are a couple ways to get one, and you might want to choose the one that appeals to you the most (or the one that’s less work - it’s up to you).
The Community Edition is a huge set of improvements and fixes applied on top of the last VM/370 that was released by IBM without a license restricting its use. These improvements and fixes have been developed and published in a variety of ways since the release of the original OS. If we were to compare it with Linux, VM/370 R6 (the release CE is based on) would be Linux 1.0 as published by Linus from his bedroom and VM/370 CE would be latest Fedora (insert your favorite maximalist distro here). It has many features that didn’t exist in R6 and a couple things that would have been called science fiction back then. It’s quite capable, even if the machines it can run on are limited to a single CPU and 16M of memory (IBM calls it “storage”).
