ASMO 449 is a now technologically obsolete[1] 7-bit coded character set to encode the Arabic language.
The design of this character set is derived[3] from the 7-bit ISO 646 (version of 1973) but with modifications suited for the Arabic language.
ASMO 449 was registered in the International Register of Coded Character Sets as IR 089[3] in 1985 and approved as an ISO standard as ISO 9036:1987 Information processing - Arabic 7-bit coded character set for information interchange.
[4] There is a variant, sometimes named ASMO 449+[5] which adds the characters NBSP in 0x75, "ﹳ" in 0x76, "لآ" in 0x77, "لأ" in 0x78, "لإ" in 0x79 and "لا" in 0x7A.
When ASMO 449 (or some variant of it) is allocated to the upper part of the 8-bit character set, it has Arabic digits.