| Acronym | Definition |
|---|
| HDA➣High Definition Audio |
| HDA➣Help Desk Analyst |
| HDA➣Health Development Agency (UK NHS) |
| HDA➣Hispanic Dental Association |
| HDA➣Hexamethylene Diamine |
| HDA➣Helideck Assistant (oil production) |
| HDA➣Head Disk Assembly |
| HDA➣Moto Honda da Amazonia (Brazilian motorcycle company) |
| HDA➣Horizontal Distribution Area |
| HDA➣Hybrid Digital-Analog |
| HDA➣Holistic Dental Association |
| HDA➣Higher Duties Allowance (Australia; pay for performing duties above employed position) |
| HDA➣High Density Area |
| HDA➣Helper Dependent Adenovirus (vectors) |
| HDA➣High Density Alloy |
| HDA➣Hall of Distinguished Alumni (Rutgers University; New Brunswick, NJ) |
| HDA➣Hawaii Department of Agriculture |
| HDA➣Hawaii Dental Association |
| HDA➣Hard Disk Assembly |
| HDA➣Hampshire Deaf Association (UK) |
| HDA➣Hometown Democracy Amendment |
| HDA➣Humanitarian Daily Rations |
| HDA➣Health Disability Advocates (Chicago, IL) |
| HDA➣Hard Decision-Aided |
| HDA➣Hardwood Distributor's Association |
| HDA➣Hemispherical Dielectric Antenna |
| HDA➣Hierarchical Decoding Algorithm |
| HDA➣Heads, Actuator, Frame and Discs |
| HDA➣Historian Data Access |
| HDA➣High Definition Amplifier |
| HDA➣Hot Dipped Aluminized paint |