Bronze Age
Bronze Age cultures differed in their development of the first writing. According to archaeological evidence, cultures in Mesopotamia (cuneiform script) and Egypt (hieroglyphs) developed the earliest viable writing systems.
The overall period is characterized by widespread use of bronze, though the place and time of the introduction and development of bronze technology were not universally synchronous. Human-made tin bronze technology requires set production techniques. Tin must be mined (mainly as the tin ore cassiterite) and smelted separately, then added to molten copper to make bronze alloy. The Bronze Age was a time of extensive use of metals and of developing trade networks (See "Tin sources and trade in ancient times"). A 2013 report suggests that the earliest tin-alloy bronze dates to the mid-5th millennium BC in a Vinča culture site in Pločnik (Serbia), although this culture is not conventionally considered part of the Bronze Age. The dating of the foil has been disputed.
Proto-Arabic
Proto-Arabic is the name given to the hypothetical reconstructed ancestor of all the varieties of Arabic attested since the 9th century BC. There are two lines of evidence to reconstruct proto-Arabic:
Old Arabic in the Nabataean script is first attested in the Negev desert in the 1st century BC, but it becomes more frequent in the region after the decline of Safaitic and Hismaic. From the 4th century AD, Old Arabic inscriptions are attested from Northern Syria to the Hejaz, in a script that is intermediate between cursive Nabataean and the Kufic script of Islamic times.