- ADDP stands for 1,1′- (Azodicarbonyl)dipiperidine
- ADDP stands for Association of Developmental Disabilities Providers (Massachusetts)
- ADDP stands for Association Départementale de Défense du Public (French: Departmental Association of Public Defense)
- ADDP stands for AIDS Drug Distribution Program
- ADDP stands for Analyze Dissect Detect Process
- ADDP stands for Advanced Digi Discovery Protocol
- ADDP stands for Asymmetrically Degenerated Differential Pair
- ADDP stands for Africa Decade of Disabled People
- ADDP stands for Air Dominance Decision Point
- ADDP stands for Appraisal Defect Detection & Prevention (finance)
- ADDP stands for Association of Due Diligence Professionals (Evergreen, CO)
- ADDP stands for Advanced Disconnect Detection Protocol (Genesys Telecommunications Laboratories, Inc.)
ADDP