The document describes several ancient writing systems including Cuneiform invented by the Sumerians in 3150 BC using wedge-shaped marks on clay tablets, hieroglyphics developed by the Egyptians around 2500 BC using pictographs and phonograms carved in stone and written with reed brushes, the Phoenician alphabet from 1500 BC which defined a system of letters and was used in the Mediterranean, and the Greek alphabet inspired by Phoenician which further defined vowels and consonants and the miniscule and majuscule forms and led to the Roman letters used today by 50 BC.