Wonderous OS that grew out of NeXT computers (Steve Jobs brainchild). It had the ease of use UNIX has always needed and an incredible GUI for development. NeXTSTEP failed to gain mass market appeal because early versions were tied directly to the sexy black hardware. Later versions supported x86, supersparc and hppa machines. NeXTSTEP was eventually sold to Apple who used it as the basis for RhapsodyOS.