ISO 8859-6
From Just Solve the File Format Problem
ISO 8859-6 is an encoding of the ISO 8859 family for the Arabic script. Languages that extend the Arabic script may not be fully supported. The ordering of characters in 8859-6 is logical, not visual; the Arabic language is predominantly right-to-left, but there are important exceptions, such as numbers. The different connecting forms of Arabic letters don't have distinct encodings.
The ISO 8859-6 encoding incorporates the ASCII characters in the first 128 code points (0-127), including the C0 controls.
