Millions of AutoCAD drawings created between 1987 and 1998 used fs-mcf as their default annotation font. If you open a legacy .dwg file in modern AutoCAD or DraftSight, you will frequently receive a "Missing SHX or MCF Font" error. The text will appear as question marks or empty rectangles unless you map fs-mcf to a modern substitute like simplex.shx or Courier New .
: It defines the topology of the equipment (libraries, drives, and file systems) that the software manages. fs-mcf font