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-Sinaitic script
The term Proto-Canaanite is also used when referring to the ancestor of the Phoenician or Paleo-Hebrew script, respectively, before some cut-off date, typically 1050 BC, with an undefined affinity to Proto-Sinaitic. 
While no extant inscription in the Phoenician alphabet is older than c. 1050 BC, "Proto-Canaanite" is a term used for the early alphabets as used during the 13th and 12th centuries BC in Phoenicia. However, the Phoenician, Hebrew, and other Canaanite dialects were largely indistinguishable before the 11th century BC. A possible example of "Proto-Canaanite" was found in 2012, the Ophel inscription, when during the excavations of the south wall of the Temple Mount by the Israeli archaeologist Eilat Mazar in Jerusalem on a storage jar made of pottery. Inscribed on the pot are some big letters about an inch high of which only five are complete and traces of perhaps three additional letters written in Proto-Canaanite script.