Wikipedia
NHD
NHD may refer to:
- National History Day (or History Day), an American academic competition focusing on history for students in grades 6-12
- National Hydrography Dataset, a digital database of surface water features in the United States
- Networked Help Desk, an open standard initiative to provide a common API for sharing customer support tickets between separate instances of issue tracking systems
- New Hacker's Dictionary, glossary of hacker slang
- nHD, a graphic display resolution of 640x360 pixels
- nhd or n'h'd, mathematical shorthand for neighbourhood