The "Cool S", also known as the "Stussy S", "Super S", "Superman S", "Universal S", "Pointy S", "Graffiti S", and many other names, is a graffiti sign in popular culture that is typically doodled on children's notebooks or graffitied on walls. The exact origin of the "Cool S" is unknown, but it may have originated from geometry textbooks and has appeared around the early 1970s as a part of graffiti culture. Contrary to popular belief, the symbol has no ties to either the U.S. clothing brand Stüssy or to the character Superman, though Stüssy did conduct an interview in 2010 with Jon Naar, a pioneer graffiti photographer with many works including this S, dating back to the 1970s.