A separate inspiration for many types described "geometric" in design has been the simplified shapes of letters engraved or stenciled on metal and plastic in industrial use, which often follow a simplified structure and are sometimes known as "rectilinear" for their use of straight vertical and horizontal lines. Designs which have been called geometric in principles but not descended from the Futura/Erbar/Kabel tradition include Bank Gothic, DIN 1451, Eurostile and Handel Gothic, along with many of the fonts designed by Ray Larabie.