Pahlavi script developed from the Aramaic alphabet and became the official script of the Sassanid Empire (224-651 CE). It changed little during the time it was in use, but around the 5th century CE, it spawned a number of new scripts, including the Psalter and Avestan scripts.
Written from right to left in horizontal lines.
Only some vowels are indicated and the letters used to represent them have multiple pronunciations.
The letters marked in red were used to write loan words from Aramaic.