The document provides a timeline of major developments in writing tools from 3200 BCE to the present. Some of the key events include: - 3200 BCE - Sumerians developed one of the earliest systems of writing in Mesopotamia using styluses to write on clay tablets. - 1250 BCE - The Shang Dynasty in China developed early forms of writing using brushes to write characters on bones, shells, and bronze artifacts. - 1100 BCE - The Phoenician alphabet, one of the earliest alphabets, emerged and became widely used in Mediterranean trade, influencing many later alphabets.