Architectural format: feet and fractional inches
Decimal units (e.g. 15.5)
Engineering format: feet as decimal with inches (e.g. 1'-3.5")
Fractional format (e.g. 15-1/2)
Scientific notation (e.g. 1.5E+01)
Windows desktop / processing format (computational units)
Linear unit display formats for coordinates and distances (AutoCAD LUNITS).
Integer codes match the values stored in the drawing header and system variable LUNITS. They describe how lengths are formatted for display and entry, not insertion-unit scaling (INSUNITS).