Address (Governmental » Military)
** Sodium (Medical » Laboratory)
** Sodium (Medical » Physiology)
** Sodium (Academic & Science » Chemistry)
** Namibia (Regional » Countries)
* Not Available (Medical » Physiology)
* Nauru (Regional » Language Codes (2 Letters))
* North America (Governmental » Military)
* Nucleic Acid (Academic & Science » Chemistry)
* North America (Governmental » US Government)
* National Association (Business » General)
* Not Allowed (Governmental » US Government)
* Not Applicable (Medical » Physiology)
* Not Applicable (Governmental » Military)
* National And (Business » Firms)
* Not Applicable (Community » Educational)
* North American (Regional)
Abbreviations dictionary. 2012.