if applicable = if appropriate, if relevant eg if a form says "Subject and grade of degree, if applicable" it means if you have a degree give the details. If you have no degree leave the box empty.
Not Applicable means not accesable - meaning that the number or figure that is 'not applicable' is not known and cannot be found.
nothing
It means non- applicable
Not Applicable.
not applicable
Not applicable . No grade.
not available or not applicable
It means that it can't be used or not applicable.
Loaded with features or applicable items.
Not Applicable
It means it doesn't apply
Mean