<unk>  (also fashioned as<unk>  or<unk>  is an acronym for General X-Ray Machine Operator license. It may also refer to the licensing exam. Persons who possess this license may add this acronym after their name to demonstrate their qualification.
GXMO
MCN
SCALPEL
ACDC 
CoWIN
SMN1
CSTX
INAH 3