- NHD
- National History Day (Miscellaneous » Days Abbreviations)* National Hydrography Dataset (Academic & Science » Ocean Science)* Newbury House Dictionary (Community » Media)* National Help Desk (Medical » Physiology)* NeuroHormone D (Medical » Physiology)* NeuroHormone D (Medical » Laboratory)* Natural Hazards Disclosure, L. L. C. (Business » Firms)* CHIRIPÁ: a language of Paraguay (Regional » Language Codes (3 Letters))* Minhad Ab, United Arab Emirates (Regional » Airport Codes)
Abbreviations dictionary. 2012.