Do you remember IBM's OS/2? It turns out that a lot of really important systems still rely on OS/2. ATMs, ticketing machines, industrial control systems. Stuff

Do you remember IBM's OS/2? It turns out that a lot of really important systems still rely on OS/2. ATMs, ticketing machines, industrial control systems. Stuff that still has plenty of lifespan left, but would be prohibitively expensive to replace from scratch. A company called eComStation produce an OS/2-compatible operating system, with full support for modern hardware. Their clients include Boeing, Fujitsu, Alstom and Siemens. I know of many vitally important systems that are still running on DOS, Windows 3.1 and a variety of even more obsolete platforms. I expect that Windows XP will continue to be a significant platform for several decades. If ReactOS ever gets out of beta, it'll be a boon for huge numbers of users.