Iran System encoding was an 8-bit

character encoding Character encoding is the process of assigning numbers to graphical characters, especially the written characters of human language, allowing them to be stored, transmitted, and transformed using digital computers. The numerical values tha ...

scheme and was created by Iran System corporation for

Persian language Persian (), also known by its endonym and exonym, endonym Farsi (, ', ), is a Western Iranian languages, Western Iranian language belonging to the Iranian languages, Iranian branch of the Indo-Iranian languages, Indo-Iranian subdivision of th ...

support. This encoding was in use in

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkm ...

in DOS-based programs and after the introduction of Microsoft

code page 1256 Windows-1256 is a code page used under Microsoft Windows to write Arabic and other languages that use Arabic script, such as Persian and Urdu. This code page is ''neither'' compatible with ISO-8859-6 nor the MacArabic encoding. Windows-1256 ...

this encoding became obsolete. However, some

Windows Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for ...

and DOS programs using this encoding are still in use and some Windows fonts with this encoding exist. Now most programs use code page 1256 or

Unicode Unicode, formally The Unicode Standard,The formal version reference is is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. The standard, ...

Character set

Only the upper half (128–255) of the table is shown, the lower half (0–127) is the same as

code page 437 Code page 437 (CCSID 437) is the character set of the original IBM PC (personal computer). It is also known as CP437, OEM-US, OEM 437, PC-8, or DOS Latin US. The set includes all printable ASCII characters as well as some accented letters (diac ...

. This character set encodes distinct visual forms separately. : * Position used for all forms of the letter. : † Initial or medial form. : ‡ Final or isolated form.

References

* Iran system charmap.png {{Improve categories, date=July 2021 DOS code pages