This property defines the Unicodes which have Limbu script
Characters like ᤀ,ᤁ,ᤂ, etc. are listed under Limbu Script.
68 Characters are present in Limbu Script starting with the Unicode point U+1900 that represents the character ᤀ.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.