COPY II PC's main competitor was Quaid Software's CopyWrite, which did not have a hardware component.
LANlord was a DOS, Windows, and OS/2 workstation management system originally developed by Client Server Technologies Group, which got seed funding from Microcom who ultimately later sold the LANlord group in February 1994 to Central Point Software (acquired by Symantec Corporation in 1994).
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MS-DOS also grew by incorporating, by direct licensing or feature duplicating, the functionality of tools and utilities developed by independent companies, such as Norton Utilities, PC Tools (Microsoft Anti-Virus), QEMM expanded memory manager, Stacker disk compression, and others.