Uyghur Arabic alphabet
The Uighur alphabet (also: Uyghur alphabet) is the alphabet created by the Uighurs to read and write the Uighur language. It is based on the Arabic alphabet. Unlike the Arabic alphabet, however, Uighur has specific letters to write vowel sounds, rather than just diacritic marks. Writing vowels in Uighur is required, not optional. This means that the writing system is a true alphabet, not an abjad like Arabic.
Uyghur Arabic Alphabet Media
MS Windows Uyghur keyboard layout. Note that vowels are composed of pairs of Arabic letters, starting by an alef with hamza, that must be entered separately on this keyboard before the actual vowel. In fact, the keyboard is based on the older Latin alphabet used for Uyghur New Script and does not allow entering all vowels correctly for the current Arabic alphabet.