NHD

NHD may refer to:

• New Hacker's Dictionary, a glossary of hacker slang.
• National History Day (or History Day), a national academic competition held in the United States by the University of Maryland, College Park, focusing on history, for students in grades 6-12.
• nHD, a graphic display resolution of 640x360 pixels. See List of common resolutions for more information.
• The United States' National Hydrography Dataset.

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