A stylus (plural: styli or styluses) is a writing utensil, or a small tool for some other form of marking or shaping, for example in pottery. The word is also used for a computer accessory that is used to assist in navigating with resistive touchscreens. It usually refers to a narrow elongated staff, similar to a modern ballpoint pen. Many styli are heavily curved to be held more easily. Another widely-used writing tool is the stylus used by blind users in conjunction with the slate for punching out the dots in Braille.