History of the Arabic alphabet

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The Arabic alphabet is thought to be traced back to a Nabataean variation of the Aramaic alphabet, known as Nabataean Aramaic. This script itself descends from the Phoenician alphabet, an ancestral alphabet that additionally gave rise to the Hebrew and Greek alphabets. Nabataean Aramaic evolved into Nabataean Arabic, so-called because it represents a transitional phase between the known recognizably Aramaic and Arabic scripts. Nabataean Arabic was succeeded by Paleo-Arabic, termed as such because it dates to the pre-Islamic period in the fifth and sixth centuries CE, but is also recognizable in light of the Arabic script as expressed during the Islamic era. Finally, the standardization of the Arabic alphabet during the Islamic era led to the emergence of classical Arabic. The phase of the Arabic alphabet today is known as Modern Standard Arabic, although classical Arabic survives as a "high" variety as part of a diglossia.