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The Persian alphabet ( ') or Perso-Arabic script is a writing system based on the Arabic script and used for the Persian language. It has four letters more than Arabic: , , , and . The Perso-Arabic script is abjad and is exclusively written cursively. That is, the majority of letters in a word connect to each other. This is also implemented on computers. Whenever the Perso-Arabic script is typed, the computer connects the letters to each other. Unconnected letters are not widely accepted. In Perso-Arabic, as in Arabic, words are written from right to left. A characteristic feature of this script, possibly tracing back to Ancient Egyptian hieroglyphs, is that vowels are underrepresented. For example, in Classical Arabic, of the six vowels, the three short ones are normally entirely omitted (although certain diacritics are added to indicate them in special circumstances, notably in the Qur'an), while the three long ones are represented ambiguously by certain consonants. The replacement of the Pahlavi script with the Arabic script in order to write the Persian language was done by the Tahirids in 9th century Khurasan. ==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 (joined on the left), medial (joined on both sides), and final (joined on the right) of a word. The names of the letter are mostly the ones used in Arabic, except for the Persian pronunciation. The only ambiguous name is ''he'', which is used for both and . For clarification, these are often called ' (literally "'-like '" after ', the name for the letter that uses the same base form) and ' (literally "two-eyed '", after the contextual middle letterform ), respectively. ; Letters which do not link to a following letter Seven letters – , , , , , , – do not connect to a following letter as the rest of the letters of the alphabet do. These 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 "alef" is at the beginning of a word such as "injā" (here), the same form is used as in an isolated "alef". In the case of "emruz" (today), the letter "re" takes the final form and the letter "vāv" takes the isolated form, though they are in the middle of the word, and also has its isolated form, though it occurs at the end of the word. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Persian alphabet」の詳細全文を読む スポンサード リンク
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