The earliest inscriptions in the Aramaic language use the Phoenician alphabet. Over time, the alphabet developed into the form shown below. Aramaic gradually became the lingua franca throughout the Middle East, with the script at first complementing and then displacing Assyrian cuneiform as the predominant writing system.
Around 500 BC, following the Achaemenid conquest of Mesopotamia under Darius I, Old Aramaic was adopted by the conquerors as the "vehicle for written communication between the different regions of the vast empire with its different peoples and languages. The use of a single official language, which modern scholarship has dubbed Official Aramaic or Imperial Aramaic, can be assumed to have greatly contributed to the astonishing success of the Achaemenids in holding their far-flung empire together for as long as they did."
Imperial Aramaic was highly standardised; its orthography was based more on historical roots than any spoken dialect and was inevitably influenced by Old Persian.
For centuries after the fall of the Achaemenid Empire in 331 BC, Imperial Aramaic—or near enough for it to be recognisable—would remain an influence on the various native Iranian languages. The Aramaic script would survive as the essential characteristics of the Pahlavi writing system.
A group of thirty Aramaic documents from Bactria have been recently discovered. An analysis was published in November 2006. The texts, which were rendered on leather, reflect the use of Aramaic in the 4th century BC Achaemenid administration of Bactria and Sogdiana.
Its widespread usage led to the gradual adoption of the Aramaic alphabet for writing the Hebrew language. Formerly, Hebrew had been written using an alphabet closer in form to that of Phoenician (the Paleo-Hebrew alphabet).
Since the evolution of the Aramaic alphabet out of the Phoenician one was a gradual process, the division of the world's alphabets into those derived from the Phoenician one directly and those derived from Phoenician via Aramaic is somewhat artificial. In general, the alphabets of the Mediterranean region (Anatolia, Greece, Italy) are classified as Phoenician-derived, adapted from around the 8th century BCE, while those of the East (the Levant, Persia, Central Asia and India) are considered Aramaic-derived, adapted from around the 6th century BCE from the Imperial Aramaic script of the Achaemenid Empire.
After the fall of the Achaemenid Empire, the unity of the Imperial Aramaic script was lost, diversifying into a number of descendant cursives.
The Hebrew and Nabataean alphabets, as they stood by the Roman era, were little changed in style from the Imperial Aramaic alphabet.
A Cursive Hebrew variant developed from the early centuries AD, but it remained restricted to the status of a variant used alongside the non-cursive. By contrast, the cursive developed out of the Nabataean alphabet in the same period soon became the standard for writing Arabic, evolving into the Arabic alphabet as it stood by the time of the early spread of Islam.
The development of cursive versions of Aramaic also led to the creation of the Syriac, Palmyrenean and Mandaic alphabets. These scripts formed the basis of the historical scripts of Central Asia, such as the Sogdian and Mongolian alphabets.
It has been suggested that the Old Turkic script in 8th century epigraphy originated in the Aramaic script.
Today, Biblical Aramaic, Jewish Neo-Aramaic dialects and the Aramaic language of the Talmud are written in the Hebrew alphabet. Syriac and Christian Neo-Aramaic dialects are written in the Syriac alphabet. Mandaic is written in the Mandaic alphabet.
Due to the near-identity of the Aramaic and the classical Hebrew alphabets, Aramaic text is mostly typeset in standard Hebrew script in scholarly literature.