Abbreviations beginning with a

ADDDAfrican Diaspora for Democracy and Development
Regional » African

ADDDBAccidental Death, Dismemberment, and Disability Benefit
Business » General

ADDDGAnglo-Danish-Dutch Diabetes Group
Academic & Science

ADDEAndrew Donald Design Engineering
Academic & Science » Engineering

ADDEAssociation of Dental Dealers in Europe
Community » Associations

ADDEAbstract Data Distribution Environment
Computing » Databases

ADDEAbstract Data Distribution Environment
Computing » IT

ADDEAlliance for Direct Democracy in Europe
Governmental » Alliances

ADDEAssociation of Dental Dealers in Europe
Medical » Dental

ADDEAlliance for Direct Democracy in Europe
Regional » European

ADDEAssociation of Dental Dealers in Europe
Regional » European

ADDEFANAd Defectionem Animi (to the point of fainting; Latin: in consequence of a defect of the mind)
Academic & Science

ADDEOSAir Defense Electro-Optical System
Governmental

ADDFArticle/Document Definition Format (Internet standard for interoperability of documents)
Academic & Science

ADDFAutomatic Digital Distribution Frame (Sprint, SDH)
Academic & Science

ADDFAlzheimer's Drug Discovery Foundation
Business » Professional Organizations

ADDFApplication Development Decision Framework
Community » Development