In less than a year, OIN has accumulated more than 100 strategic, worldwide patents and patent applications that span Web / Internet, e-commerce, mobile and communications technologies. These patents are available to all as part of the free Linux ecosystem that OIN is creating around, and in support of Linux. We stand ready to leverage our IP portfolio to maintain the open patent environment OIN has helped create.
Microsoft would prefer not to actually sue anyone, particularly a Linux user who's also a Microsoft customer. "They'd have to name the patents then, and they're probably happier with the FUD [fear, uncertainty, doubt] than with any lawsuit," Torvalds predicted.
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