Look for IBM Redbooks, also the "Mainframe" has 5 different operating systems, zVM, OS2, zOS, Linux (s390x architecture), and somehow I forgot the other. There

Look for IBM Redbooks, also the "Mainframe" has 5 different operating systems, zVM, OS2, zOS, Linux (s390x architecture), and somehow I forgot the other. There is Code in a multitude of languages even when it is not Linux, from C++ to Java, but nowadays also nodejs and whatever you want to run in that architcture. Edit: Basically, you should look for "System Z" which is the actual name of the machine, and "redbooks" the name of the documentation manuals. Example: https://www.redbooks.ibm.com/domains/zsystems https://www.redbooks.ibm.com/domains/zsystems