> What is the difference in Yarn for DOS between
>     yarn  .exe
>     yarnx .exe  ?
YARN.EXE is the plain 16-bit DOS version, which should run on all PCs.
Whether it actually does I don't know -- some apparently have had
problems.  However, it is limited about how many articles per newsgroup
it can handle.
YARNX.EXE is the 32-bit version with a DOS extender built into the
executable file (earlier versions of Yarn had it as a separate file).
It can handle much larger news bases, but requires an 80386 or higher
processor to run.
Yngvar