Ancient South Arabian script
| Ancient South Arabian script | |
|---|---|
| Script type | |
| Period | Late 2nd millennium BCE to 6th century CE | 
| Direction | Right-to-left, boustrophedon | 
| Languages | Old South Arabian, Ge'ez | 
| Related scripts | |
| Parent systems | Egyptian hieroglyphs 
 | 
| Child systems | Geʽez | 
| Sister systems | Ancient North Arabian | 
| ISO 15924 | |
| ISO 15924 | Sarb (105), Old South Arabian | 
| Unicode | |
| Unicode alias | Old South Arabian | 
| U+10A60–U+10A7F | |
The Ancient South Arabian script (Old South Arabian: 𐩣𐩯𐩬𐩵 ms3nd; modern Arabic: الْمُسْنَد musnad) branched from the Proto-Sinaitic script in about the late 2nd millennium BCE, and remained in use through the late sixth century CE. It is an abjad, a writing system where only consonants are obligatorily written, a trait shared with its predecessor, Proto-Sinaitic, as well as some of its sibling writing systems, including Arabic and Hebrew. It is a predecessor of the Ge'ez script, and a sibling script of the Phoenician alphabet and, through that, the modern Latin, Cyrillic, and Greek alphabets.