This property defines the Unicodes which has Jamo Short Name as M
Characters like ᄆ,ᆷ, etc. are listed under M Jamo Short Name.
2 Characters are present in M Jamo Short Name starting with the Unicode point U+1106 that represents the character ᄆ.
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.