The Helmers reading mentioned iconography and symbols as the fourth step of the visual analysis process. The photo I took is of the ambulance at my workplace. This symbol of a snake and staff over a star shape instantly conveys to me emergency medical services. If I were in an unfamiliar place or somewhere where English wasn’t spoken, if I saw this symbol I know I could get help in an emergency. In such important situations, there’s no room for miscommunication, and having a recognizable symbol communicate in place of words ensures that more people will receive the message.