This property defines the Unicodes which has Jamo Short Name as A
Characters like ᅡ, etc. are listed under A Jamo Short Name.
1 Characters are present in A Jamo Short Name starting with the Unicode point U+1161 that represents the character ᅡ.
Currently, as per latest version 15.0.0, Unicode supports 53 number of Jamo Short Name. Here are a few examples - A,AE,B, etc.