Writing system
Writing systems were preceded by proto-writing, systems of ideographic and/or early mnemonic symbols. The best known examples are:The invention of the first writing systems is roughly contemporary with the beginning of the Bronze Age in the late Neolithic of the late 4th millennium BC. The Sumerian archaic cuneiform script and the Egyptian hieroglyphs are generally considered the earliest writing systems, both emerging out of their ancestral proto-literate symbol systems from 3400 to 3200 BC with earliest coherent texts from about 2600 BC. It is generally agreed that Sumerian writing was an independent invention; however, it is debated whether Egyptian writing was developed completely independently of Sumerian, or was a case of cultural diffusion.
History of libraries
The first libraries consisted of archives of the earliest form of writing – the clay tablets in cuneiform script discovered in temple rooms in Sumer, some dating back to 2600 BC. About an inch thick, tablets came in various shapes and sizes. Mud like clay was placed in the wooden frames, and the surface was smoothed for writing and allowed to dry until damp. After being inscribed, the clay dried in the sun, or for a harder finish, was baked in a kiln. For storage, tablets could be stacked on edge, side by side, the contents described by a title written on the edge that faced out and was readily seen. The first libraries appeared five thousand years ago in Southwest Asia's Fertile Crescent, the area that ran from Mesopotamia to the Nile in Africa. Known as the cradle of civilization, the Fertile Crescent was the birthplace of writing, sometime before three thousand BC. (Murray, Stuart A.P.) These archives, which mainly consisted of the records of commercial transactions or inventories, mark the end of prehistory and the start of history.