For those who want to play around with it:

> http://toastytech.com/guis/qnxdemo.html

> https://winworldpc.com/product/qnx/144mb-demo

A word of caution: the first URL doesn't have TLS (HTTPS). None of the links to the demos have either. The links on Win World PC don't have any checksums.

I actually remember using this demo floppy though, back in those days (the other impressive Unix-like OS I used back then was BeOS). It was the first time I stumbled upon Towers of Hanoi. Sadly the main developer of QNX passed away.

I think the 32-bit MenuetOS still fits on a floppy (and is open source).

graphical os smaller than your average favicon