SDA
- 3,4-methylenedioxyamphetamine
- Device file
- I²C
- National Social Democratic Front
- Party of Democratic Action
- Polk Audio
- SD Card Association
- SDA (drug)
- SDA Bocconi School of Management
- SDA Tennis Open
- Sabouraud dextrose agar
- Saddam International Airport
- Same-day affirmation
- San Diego and Arizona Railway
- San Dieguito Academy
- Scratch drive actuator
- Screen Design Aid
- Secular Democratic Alliance
- Serotonin–dopamine antagonist
- Seventh-day Adventist Church
- Severe Disablement Allowance
- Shandong Airlines
- Shop, Distributive and Allied Employees Association
- Singapore Democratic Alliance
- Slow DoS attack
- Social Democratic Alliance (UK)
- South Devon Alliance
- Southern Dames of America
- Southern Domestic Airspace
- Space Development Agency
- Space domain awareness
- Specially denatured alcohol
- Specific dynamic action
- Speed Demos Archive
- Stearidonic acid
- Structured digital abstract
- Swiss Telegraphic Agency
- Symbolic data analysis
- Systemic design
- T-Mobile SDA