* JD (Juris Doctor): This is the most common professional law degree in the United States and many other countries.
* LL.B. (Bachelor of Laws): This is a common undergraduate law degree in some countries, particularly in the Commonwealth.
* LL.M. (Master of Laws): This is a postgraduate degree for lawyers who want to specialize in a particular area of law.
* SJD (Doctor of Juridical Science): This is a postgraduate research degree, usually for those wanting to pursue an academic career in law.
If you encountered "NA" in relation to a law degree, it's likely a typo, an abbreviation specific to a particular institution (that isn't widely used), or a misunderstanding. More context is needed to understand what it means.