| Acronym | Definition |
|---|
| HfSi➣Hafnium Silicide |
| HfSi➣Healthcare Fire Safety Instructors (California) |
| HfSi➣Honeywell Federal Systems, Inc. (formerly) |
| HfSi➣High Frequency Service Item |
| HfSi➣Healthcare Financial Strategies, Inc. |
| HfSi➣Hogan Financial Systems, Inc. |
| HfSi➣Hardman Financial Services, Inc. |
| HfSi➣Heart Failure Support Initiative |
| HfSi➣Hawkeye Food Systems, Inc. |
| HfSi➣Hawaii Family Support Institute |
| HfSi➣High Frequency Service Indicator |
| HfSi➣Healthy Fair-Skinned Infant |
| HfSi➣Houses For Sale In (UK realestate web portals) |
| HfSi➣Holy Family Service International (Houston, TX) |