| ADDA | American Design Drafting Association | 美国设计制图协会 |
| ADDA | Associazione per la Difesa dei Diritti degli Animali | 动物保护协会 |
| ADDA | Attention Deficit Disorder Association | 注意缺陷障碍协会 |
| ADDA | Australian Database Development Association | 澳大利亚数据库开发协会 |
| ADDA | Anxiety Disorders Association of America (Silver Spring, MD) | 美国焦虑症协会（医学博士Silver Spring） |
| ADDA | Active Defense Decision Aid | 主动防御决策援助 |
| ADDA | American Dream Downpayment Act | 美国梦首付款法案 |
| ADDA | Analog Digital Digital Analog | 模拟数字数字模拟 |
| ADDA | Advanced Data Dictionary Architect | 高级数据字典架构师 |
| ADDA | Analogue Digital Digital Analogue | 模拟数字数字模拟 |
| ADDA | Assistant District Director for Adjudications | 负责裁决的助理区长 |
| ADDA | Attention Deficit Disorder in Adults | 成人注意缺陷障碍 |