| Rank | Abbreviation | Meaning |
|---|
| ***** | APAD | acute population adjusted dose
| |
| ***** | APAD | Air Pollution Action Day
| |
| **** | APAD | A Pun A Day
| |
| **** | APAD | Asynchronous Packet Assembler Disassembler
| |
| **** | APAD | Acoustic Puncture Assist Device
| |
| **** | APAD | 3-acetylpyridine adenine dinucleotide
| |
| **** | APAD | Assistance Pédagogique à Domicile
| |
| **** | APAD | Angkatan Pelukis Aneka Daya
| |
| **** | APAD | Anterior Posterior Abdominal Diameter
| |
| **** | APAD | Arts Promotion Association for the Disabled
| |
| *** | APAD | Associação Portuguesa de Argumentistas e Dramaturgos
| |
| *** | APAD | A Photo A Day
| |
| *** | APAD | Asymptomatic Peripheral Arterial Disease
| |
| *** | APAD | Act on Protection Against Discrimination
| |
| ** | APAD | And the Portuguese Agency for Development
| |
| ** | APAD | Associação de Pais e Amigos de Disléxicos
| |
| ** | APAD | Asia Pacific Association of Derivatives
| |
| ** | APAD | Affinity-purified IgG anti-DNA
| |
| ** | APAD | Agency for Public Administration Development
| |
| ** | APAD | 3-acetylpyridine Adenine Dinucleotidepar
| |
| * | APAD | Agência Portuguesa de Apoio ao Desenvolvimento
| |
| * | APAD | ADPADS, INC.
| |
| * | APAD | Addictive Psycho Active Drugs
| |
| * | APAD | Adventure Play And Design
| |
| * | APAD | Australian Performing Arts Directory
| |