Persian alphabet

The Persian alphabet, also known as the Perso-Arabic script, is the right-to-left alphabet used for the Persian language. An Arabic-based alphabet, it is largely identical to the Arabic alphabet with four additional letters: پ چ ژ گ, in addition to the obsolete ڤ that was used for the sound. This letter is no longer used in Persian, as the -sound changed to, e.g. archaic زڤان > زبان 'language'. Although the sound is written as "و" nowadays in Farsi, it is different to the Arabic sound, which uses the same letter.
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.

History

The Persian alphabet is directly derived and developed from the Arabic alphabet. The Arabic alphabet was introduced to the Persian-speaking world after the Muslim conquest of Persia and the fall of the Sasanian Empire in the 7th century. Following this, the Arabic language became the principal language of government and religious institutions in Persia, which led to the widespread usage of the Arabic script. Classical Persian literature and poetry were affected by this simultaneous usage of Arabic and Persian. A new influx of Arabic vocabulary soon entered the Persian language. In the 8th century, the Tahirid dynasty and Samanid dynasty officially adopted the Arabic script for writing Persian, followed by the Saffarid dynasty in the 9th century, gradually displacing the various Pahlavi scripts used for the Persian language earlier. By the 9th-century, the Perso-Arabic alphabet became the dominant form of writing in Greater Khorasan.
Under the influence of various Persian Empires, many languages in Central and South Asia that adopted the Arabic script use the Persian Alphabet as the basis of their writing systems. Today, extended versions of the Persian alphabet are used to write a wide variety of Indo-Iranian languages, including Kurdish, Balochi, Pashto, Urdu, Saraiki, Panjabi, Sindhi and Kashmiri. In the past the use of the Persian alphabet was common amongst Turkic languages, but today is relegated to those spoken within Iran, such as Azerbaijani, Turkmen, Qashqai, Chaharmahali and Khalaj. The Uyghur language in western China is the most notable exception to this.
During the Soviet period many languages in Central Asia, including Persian, were reformed by the government. This ultimately resulted in the Cyrillic-based alphabet used in Tajikistan today. See:.

Letters

Below are the 32 letters of the modern Persian alphabet. Since the script is cursive, the appearance of a letter changes depending on its position: isolated, initial, medial and final of a word. These include 28 letters of the Arabic alphabet, in addition to 4 other letters.
The names of the letters are mostly the ones used in Arabic except for the Persian pronunciation. The only ambiguous name is, which is used for both ح and ه. For clarification, they are often called and , respectively. There are eight Persian letters that are mainly used in Arabic or foreign loanwords and not in native words: ث, ح, ذ, ص, ض, ط, ظ, ع and غ. These eight letters are also commonly used only in proper names. Unlike Arabic, the Persian language does not have pharyngealization at all. Although the letter غ is mainly used in Arabic loanwords, there are some native Persian words with this letter: آغاز, زغال, etc. The pronunciation of these letters in Persian can differ from their pronunciation in Arabic. For example, the letter ث is pronounced as in Persian, while it is pronounced as in Arabic.

Letter	Persian	Arabic
	/s/	/θ/
	/h/	/ħ/
	/z/	/ð/
ص	/s/	/sˤ/
ض	/z/	/dˤ/
ط	/t/	/tˤ/
ظ	/z/	/ðˤ/
ع	/ʔ/	/ʕ/
غ	or	/ɣ/

Overview table

Historically, in Early New Persian, there was a special letter for the sound. This letter is no longer used, as the -sound changed to, e.g. archaic زڤان /zaβān/ > زبان 'language'.

Name	Name	Transliteration	Sound	Isolated form	Final form	Medial form	Initial form
ڤ	ve	/ /		ڤ	ـڤ	ـڤـ	ڤـ

Another obsolete variant of the twenty-sixth letter گ is ݣ‎ which used to appear in old manuscripts.

Sound	Isolated form	Final form	Medial form	Initial form	Name
	ݣ‎	ـݣ‎	ـݣـ‎	ڭـ	'

Another obsolete variant of the twenty-fifth letter ک is ك‎ which used to appear in old manuscripts.

Sound	Isolated form	Final form	Medial form	Initial form	Name
	ك‎	‎ـك	ـكـ‎	كـ	'

The archaic letter ݿ was also used as a substitute for the twenty-sixth letter of the Persian alphabet, گ, which was used to appear in the older manuscripts of Persian in the late 18th century to the early 19th century.

Sound	Isolated form	Final form	Medial form	Initial form	Name
	ݿ‎	‎ـݿ	ـݿـ‎	ݿـ

Variants

Letter construction

The i'jam diacritic characters are illustrative only; in most typesetting the combined characters in the middle of the table are used.
Persian yē has 2 dots below in the initial and middle positions only. The standard Arabic version ي يـ ـيـ ـي always has 2 dots below.

Letters that do not link to a following letter

Seven letters do not connect to the following letter, unlike the rest of the letters of the alphabet. The seven letters have the same form in isolated and initial position and a second form in medial and final position. For example, when the letter ا is at the beginning of a word such as اینجا , the same form is used as in an isolated. In the case of امروز , the letter ر takes the final form and the letter و takes the isolated form, but they are in the middle of the word, and ز also has its isolated form, but it occurs at the end of the word.

Diacritics

Persian script has adopted a subset of Arabic diacritics: , , and or , and . Other Arabic diacritics may be seen in Arabic loanwords in Persian.
File:Nastaliq Painting-Caligraphy the letter Mim.jpg|thumb|alt=180|Nastaliq Persian Calligram the Persian letter Mem

Short vowels

Of the four Arabic diacritics, the Persian language has adopted the following three for short vowels. The last one, sukūn, which indicates the lack of a vowel, has not been adopted.
There is no standard transliteration for Persian. The letters 'i' and 'u' are only ever used as short vowels when transliterating Dari or Tajik Persian. See Persian Phonology
Diacritics differ by dialect, due to Dari having 8 distinct vowels compared to the 6 vowels of Farsi. See Persian Phonology
In Farsi, none of these short vowels may be the initial or final grapheme in an isolated word, although they may appear in the final position as an inflection, when the word is part of a noun group. In a word that starts with a vowel, the first grapheme is a silent which carries the short vowel, e.g. اُمید. In a word that ends with a vowel, letters ع, ه and و respectively become the proxy letters for, and, e.g. نو or بسته.

Tanvin (nunation)

Nunation is the addition of one of three vowel diacritics to a noun or adjective to indicate that the word ends in an alveolar nasal sound without the addition of the letter nun.

Nunation	Name	Name	Notes
064B	تنوین نَصْبْ
064D	تنوین جَرّ		Never used in the Persian language. Taught in Islamic nations to complement Quran education.
064C	تنوین رَفْعْ		Never used in the Persian language. Taught in Islamic nations to complement Quran education.

Tašdid

Symbol	Name	Name
0651	تشدید

Other characters

The following are not actual letters but different orthographical shapes for letters, a ligature in the case of the. As to ﺀ, it has only one graphical form since it is never tied to a preceding or following letter. However, it is sometimes 'seated' on a, or, and in that case, the seat behaves like an ordinary, or respectively. Technically, hamza is not a letter but a diacritic.
Although at first glance, they may seem similar, there are many differences in the way the different languages use the alphabets. For example, similar words are written differently in Persian and Arabic, as they are used differently.
Unicode has accepted in the Miscellaneous Symbols range. In Unicode 1.0 this symbol was known as. It is a stylization of الله used as the emblem of Iran. It is also a part of the flag of Iran.
The Unicode Standard has a compatibility character defined that can represent ریال, the Persian name of the currency of Iran.