Comment Like AmigaOS it just wont die (Score 4, Interesting) 133
OS/2 is still used quite extensively in Australia by banking institutions, who claim it is still more reliable than the Windows equivalents. Much of the critical banking infrastructure reliant on OS/2 has since been ported to Linux (Mostly running atop RHEL.) The combination of high stability. the very configurable and flexible workplace shell with REXX IPC, at a time when the NT kernel was still being sorted ensured rapid uptake and penetration in some vertical markets. Like the AmigaOS it was very economical of system resources and had a very consistent UI. There are still lessons in the Workplace Shell (OS/2) and Intuition (Amiga) for both KDE and GNOME. Window managers with some of the WS features for Linux http://en.wikipedia.org/wiki/Workplace_Shell and related http://www.desktoplinux.com/news/NS7822082064.html