- ADDA stands for Attention Deficit Disorder Association
- ADDA stands for American Design Drafting Association
- ADDA stands for Anxiety Disorders Association of America (Silver Spring, MD)
- ADDA stands for Attention Deficit Disorder in Adults
- ADDA stands for Australian Database Development Association
- ADDA stands for Associazione per la Difesa dei Diritti degli Animali
- ADDA stands for American Dream Downpayment Act
- ADDA stands for Assistant District Director for Adjudications
- ADDA stands for Active Defense Decision Aid
- ADDA stands for Analogue Digital Digital Analogue
ADDA