I am looking at a PDF which is using the `European Pi 3' font. As you can see here, this font doesn't render the characters like actualy characters, but like different icons. The 'P' is a big circle, 'S' is a telephone, 'V' is a pointing finger etc.
Wingdings is a similar example that comes to mind.
Is there a name for fonts like this, i.e. which do not render characters, but random symbols?
Also, is there a way to programatically/systematically know if a font belongs to this category?