What does DPN stand for?

Diamond Pyramid Hardness Number

This definition appears very rarely

Other Resources:

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Demand Promissory Note Dépôt Pétrolier de Nanterre (French: Oil Depot in Nanterre; Nanterre, France) Depression Dermatosis Papulosa Nigra (skin condition) Desktop Pipeline Newsletter Deuda Publica Nacional (National Public Debt) Deutsches Provider Network (ISP) Développement de Produits Nouveaux (French: New Product Development) Diabetic Peripheral Neuropathy Diagnostic Prénatal (French: Prenatal Diagnostic)		Dictionnaire Participatif de Néologismes (French: Participatory Dictionary of Neologisms) Diffusion Publicitaire Nationale (French: National Broadcast Advertising) Digital Packet Network Digital Path not provided signal (ITU-T) Digital PhishNet (AOL, FBI, FTC, Microsoft, Secret Service, VeriSign) Digital Photography News Digital Project Notebook Dip-Pen Nanolithography Direction de la Protection de la Nature (French: Directorate of Nature Protection; various organizations) Direction des Parcs Nationaux (French: Department of National Parks; Sénégal)