Veteran MS-DOS users blench at expressions like highly compatible with respect to operating systems that are designed to run MS-DOS applications, because they usually find that their favourite programs are the very ones that fall outside the scope of the compatibility, but Stongline Inc, Mountain View, California will soon be touting Wendin-DOS 2.5, a multi-user, multi-tasking operating system from the Spokane, Washington based Wendin Inc that is claimed to be highly compatible with PC-DOS and MS-DOS applications; Strongline is also taking on PCVMS version 2.5, described as a self-bootable, multi-tasking, multi-user operating system that provides a VAX/VMS-style environment for MS-DOS machines, running most MS-DOS programs on the main console and including Wendin’s Application Developer’s Kit in the $140 price; PCNX 2.5 offers the same facilities with a Unix-style user interface.