We've shared information [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] and a video about this before. It's not so easy to find ithis because it's kept fairly secret until shortly after it's ready for signing and too late for people to learn about and protest against.
To maximise awareness and encourage action against these intellectual monopolies, here are the rest of the videos we could find, starting with those that are more decent (some are less accurate). ⬆
Narrowing down to desktops and laptops, and judging by Web requests that go through Clownflare, many people there use GNU/Linux or Google's 'bastardised' version of it (with spyware preloaded)
From what we can gather, the tram ticketing system does not use Windows; we never saw it crashing or rebooting (or showing some Windows logo) in decades, so we assume it runs some kind of Linux