| HDA | haemodialysis 
| Others |
| HDA | Hail Detection Algorithm
| Others |
| HDA | Hampden DuBose Academy
| Others |
| HDA | Hampshire Deaf Association
| Others |
| HDA | Hard Decision Aided
| Others |
| HDA | hard disk A and
| Others |
| HDA | Hard Disk Assembly
| Others |
| HDA | hard drive a
| Others |
| HDA | Hard Drive Adapter
| Others |
| HDA | Hawaii Dental Association
| Others |
| HDA | Head Disk Assembly
| Others |
| HDA | Head-Disk Assembl
| Others |
| HDA | Health & Disability Advocates
| Others |
| HDA | Health and Disability Advocates
| Others |
| HDA | Health Development Agency (obsolete)
| Others |
| HDA | Healthcare Distribution Alliance
| Others |
| HDA | Heavy Duty Alloy
| Others |
| HDA | Heavy Duty Aluminium
| Others |
| HDA | Help Desk Analyst
| Others |
| HDA | Hemispherical Dielectric Antenna
| Others |
| HDA | heptadecanoic acid
| Others |
| HDA | Heritage Digital Academy
| Others |
| HDA | heteroduplex analysis
| Others |
| HDA | Hidden Falls, Alaska USA
| Others |
| HDA | High Def Audio
| Others |
| HDA | High Definition Array
| Others |
| HDA | High Definition Audio
| Others |
| HDA | High Density Amylopectin
| Others |
| HDA | High Density Analog Voice
| Others |
| HDA | High Detection Assisted
| Others |
| HDA | High Dose Alert
| Others |
| HDA | Higher Duties Allowance
| Others |
| HDA | Highway Driving Assist
| Others |
| HDA | Hill Descent Assist
| Others |
| HDA | Hispanic Dental Association
| Others |
| HDA | Historia Del Arte
| Others |
| HDA | Historical Data Access
| Others |
| HDA | History Data Access
| Others |
| HDA | History of Decorative Arts
| Others |
| HDA | Holiday Decorative Association
| Others |
| HDA | Holistic Dental Association
| Others |
| HDA | Home Digital Assistant
| Others |
| HDA | Honda Dealers Alternative
| Others |
| HDA | Houdini Digital Asset
| Others |
| HDA | Housekeeping Data Acquisition
| Others |
| HDA | Housing Development Agency
| Others |
| HDA | Hummer Driving Academy
| Others |
| HDA | Humorous Duet Acting
| Others |
| HDA | Hybrid Design Associates
| Others |
| HDA | Hydroxy Decanoic Acid
| Others |