Unicode Chart 
Maps
https://en.wikipedia.org/wiki/Proto-Sinaitic_script
DISCLAIMER: This script is still being researched
Data
| ISO 15924 | 103 Psin |
|---|---|
| Type | Abjad |
| Direction | LtR, RtL (Variable) |
| Earliest Date | 200 BCE |
| Ancestry |
|
Bibliography
| Author | Year | Publication | Publisher |
|---|---|---|---|
| Coulmas, Florian | 1996 | The Blackwell Encyclopedia of Writing Systems, 383-423 | Blackwell Publishing |