青铜中期文化时期字母包括两种相似的未解读文本，可追溯至青铜时代（公元前2000年 - 公元前1500年），据信是差不多全世界的现代字母系统的始祖。

Proto-Sinaitic is a term for both a Middle Bronze Age (Middle Kingdom) script attested in a small corpus of inscriptions found at Serabit el-Khadim in the Sinai Peninsula, and the reconstructed common ancestor of the Paleo-Hebrew, Phoenician and South Arabian scripts, and by extension of most historical and modern alphabets. It is also referred to as Sinaitic, Paleo- or Proto-Hebraic, Proto-Canaanite, Old Canaanite, and Canaanite.