Similar to pictographs, petroglyphs are also images instead of letters, but are engraved into a cave or a rock. A pictograph maybe be a pictograph as well. Pictographs are basic drawing or sketches literally representing an object, idea, or an animal. Unlike petroglyphs, pictographs were not sketched into a hard medium like a cave wall. Ideographs are symbols inside the pictograph or the petroglyph that represents ideas or concepts. Ideographs are similar to modern-day traffic signs. Phono, meaning sound or voice, and grams meaning a drawing or something is written; phonograms are images that illustrate a sound the picture would make. Phonograms created a type of writing called, cuneiform. Cuneiform, is a complicated writing system with 560 signs. An alphabet is consists of graphic symbols or characters, that when put together, create the basic sound of a language. Alphabets are much more efficient than cuneiform or hieroglyphics that required the memorization of hundreds of symbo...