HDA

HDA may refer to:

Computing

• Intel High Definition Audio
• OPC Historical Data Access
• /dev/hda, see Device file § Naming conventions
• Head and Disk Assembly of a Winchester disk

Science and mathematics

• Helicase-dependent amplification
• High density amorphous ice
• Higher-dimensional algebra

Other uses

• Dragonair
• Ein Shemer Airfield
• Hardlines Distribution Alliance, a hardware store retailers' cooperative
• Hockey Diversity Alliance
• The Holy Demon Army
• Huntington's Disease Association