This property defines the Unicodes which are Non Spacing Marks
Characters like ̀,́,̂, etc. are listed under Non Spacing Mark General Category.
1985 Characters are present in Non Spacing Mark General Category starting with the Unicode point U+0300 that represents the character ̀.
Currently, as per latest version 15.0.0, Unicode supports 30 number of General Category. Here are a few examples - Close Punctuation,Connector Punctuation,Control Character, etc.