Persian alphabet

Persian alphabet
الفبای فارسی
Alefbâ-ye Fârsi
A page from a 12th century manuscript of "Kitab al-Abniya 'an Haqa'iq al-Adwiya" by Abu Mansur Muwaffaq with special Persian letters p (پ), ch (چ) and g (گ = ڭـ).
Script type
Abjad
Period
c.7th century CE  present
DirectionRight-to-left script 
LanguagesPersian, Mazanderani, Moghol, Qashqai
Related scripts
Parent systems
Child systems

The Persian alphabet (Persian: الفبای فارسی, romanized: Alefbâ-ye Fârsi), also known as the Perso-Arabic script, is the right-to-left alphabet used for the Persian language. It is a variation of the Arabic script with four additional letters: پ چ ژ گ (the sounds 'g', 'zh', 'ch', and 'p', respectively), in addition to the obsolete ڤ that was used for the sound /β/. This letter is no longer used in Persian, as the [β]-sound changed to [b], e.g. archaic زڤان /zaβɑn/ > زبان /zæbɒn/ 'language'.

It was the basis of many Arabic-based scripts used in Central and South Asia. It is used for both Iranian and Dari: standard varieties of Persian; and is one of two official writing systems for the Persian language, alongside the Cyrillic-based Tajik alphabet.

The script is mostly but not exclusively right-to-left; mathematical expressions, numeric dates and numbers bearing units are embedded from left to right. The script is cursive, meaning most letters in a word connect to each other; when they are typed, contemporary word processors automatically join adjacent letter forms. Persian is unusual among Arabic scripts because a zero-width non-joiner is sometimes entered in a word, causing a letter to become disconnected from others in the same word.