| Acronym | Definition |
|---|
| HDI➣Human Development Index (UNDP yardstick of human welfare) |
| HDI➣Help Desk Institute |
| HDI➣High Density Interconnect (poly clad laminates) |
| HDI➣Humpty Dumpty Institute (New York, New York) |
| HDI➣Human Development Initiatives (Nigeria) |
| HDI➣Hexamethylene Diisocyanate |
| HDI➣Helen Dowling Instituut (Dutch: Helen Dowling Institute; cancer foundation) |
| HDI➣Haftpflichtverband der Deutschen Industrie (German mutual insurance association) |
| HDI➣Heidi Device Interface |
| HDI➣High Density Interface |
| HDI➣High Pressure Direct Injection |
| HDI➣High Density Interconnect |
| HDI➣High Definition Imaging |
| HDI➣Hoops Device Interface |
| HDI➣Head to Disk Interface |
| HDI➣High-Dose Interferon (treatment) |
| HDI➣High Density Interconnection |
| HDI➣Historically Disadvantaged Individual |
| HDI➣Help Desk International (various locations) |
| HDI➣Household Disposable Income (finance) |
| HDI➣Heidi Device Interface (AutoCAD) |
| HDI➣Head to Disk Interference |
| HDI➣Human Development Interface (index) |
| HDI➣Harper Design International (publishing) |
| HDI➣High-Pressure Direct Injection Diesel |
| HDI➣Hard Disk Interface |
| HDI➣Haute Pression Diesel Injection (French: High Pressure Diesel Injection) |
| HDI➣High-Definition Interface |
| HDI➣Home Discovery Inspections (Orlando, FL) |
| HDI➣HOOPS Device Interface (Vagi) |
| HDI➣Human Device Interface |
| HDI➣Head-to-Disk Interface |
| HDI➣Harley-Davidson Incorporated (former stock symbol) |
| HDI➣High Diesel Injection |
| HDI➣Historic Denver, Inc. |
| HDI➣Homestead Design, Inc. (Essex, VT) |
| HDI➣Horizontal Deviation Indicator (airplane instrument) |
| HDI➣High Density Index |
| HDI➣Hochschuldidaktik Informatik |
| HDI➣Hekimian Database Interface |
| HDI➣Human Dynamics Incorporated |
| HDI➣High-Distance Interleaver |