LongFileNames---ShortFileNames
Microsoft short filenames consists of an maximum of 8 characters before
and 3 characters after the dot ( e.g. 12345678.abc ).
Long filenames are limited to 260 characters. The shorter the filename,
the longer the path may be. Practically it would be good not to use filenames
longer than 25 characters. Also the archiving of long filenames on old
dos systems is very difficult. Never use Directory names, which are
identically in the first 6 characters, because the correct copy between
old Dos and Win9x can not be guaranteed.