MINIX is a Unix-like operating system written by Andy Tanenbaum for teaching operating system classes. Minix has been ported to a number of computer systems, the QL being the the most recent on the list.
Since Minix is like Unix, users can learn about Unix from various levels. Users can become familiar with the operating system at the user level or at any deeper level. Users can understand the various parts of Unix, from the filing system to the scheduling system. One can also use UUCP (Unix to Unix Copy Program) to automatically send mail and files to other Unix systems. The only limit is on the memory and speed of the QL.