Pictogram is another term for pictograph. It is also called pictogramme as well as picto. It is also an icon that was used during ancient days to convey any information or an event or to refer something through illustrative alikeness to a corporal body. They are earliest form of writing and representation. Through pictograms, anything may be referred to with the help of images or pictures of physical object and is a form of hieroglyphic writing which uses symbols, signs and sounds for communication.