This property defines the Unicodes which have Greek script
Characters like Ͱ,ͱ,Ͳ, etc. are listed under Greek Script.
518 Characters are present in Greek Script starting with the Unicode point U+0370 that represents the character Ͱ.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.