Nathan Myhrvold from Microsoft is now managing Intellectual Ventures, which is arguably a bigger patent troll than Acacia [1, 2, 3, 4, 5, 6, 7, 8, 9]. We mentioned this company before because Microsoft could use Intellectual Ventures for lawsuits against competitors like Linux, by proxy [1, 2, 3, 4, 5].
Watch the following recent video and jump to 35:20, which contains some GNU/Linux FUD. For future reference, as you can see, this guy is quite hostile towards open source. This includes myths about the technical abilities of Free software programmers, user friendliness, cost, etc. ⬆
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