This property defines the Unicodes which have Orkhon (Old Turkic) script
Characters like 𐰀,𐰁,𐰂, etc. are listed under Orkhon (Old Turkic) Script.
73 Characters are present in Orkhon (Old Turkic) Script starting with the Unicode point U+10C00 that represents the character 𐰀.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.