Arab x chat
It differs from more formal and academic Arabic transliteration systems, as it avoids diacritics by freely using digits and multigraphs for letters that do not exist in the basic Latin script (ASCII).The Arabic chat alphabet is used to communicate in Arabic over the Internet or for sending messages via cellular phones when the Arabic alphabet is unavailable or difficult to use for technical reasons.
For example, the numeral "3" is used to represent the Arabic letter ⟨)—note the choice of a visually similar character, with the numeral resembling a mirrored version of the Arabic letter.
Most of these technologies originally permitted the use of the Latin script only, and some still lack support for displaying Arabic script.
As a result, Arabic-speaking users frequently transliterate Arabic text into Latin script when using these technologies to communicate.
Many users of mobile phones and computers use Arabish even though their system is capable of displaying Arabic script.
This may be due to a lack of an appropriate keyboard layout for Arabic, or because users are already more familiar with the QWERTY keyboard layout.