| HHI | Haitian Health Institute 
| Others |
| HHI | Handgun Hunters International
| Others |
| HHI | Happy Hacker Industries
| Others |
| HHI | Harvard Humanitarian Initiative
| Others |
| HHI | Haubrick Home Inspections
| Others |
| HHI | Hawg Halters Inc
| Others |
| HHI | Healing Hands International
| Others |
| HHI | Health Help International
| Others |
| HHI | Healthier Hospitals Initiative
| Others |
| HHI | Healthy Homes Initiative
| Others |
| HHI | Healthy House Institute
| Others |
| HHI | Heart to Heart International
| Others |
| HHI | Heinrich Hertz Institut
| Others |
| HHI | Heinrich Hertz Institute
| Others |
| HHI | Heinrich Hertz Institute's
| Others |
| HHI | Henry Henderson Institute
| Others |
| HHI | Herfindahl Hirschman Index
| Others |
| HHI | Herfindahl Hirshman Index
| Others |
| HHI | Herfindahl Hishman Index
| Others |
| HHI | Herfindhal Herishman Indicator
| Others |
| HHI | Heritage Health Index
| Others |
| HHI | Herth Hope Index
| Others |
| HHI | Highway Highway Intersection
| Others |
| HHI | Hilton Head Island
| Others |
| HHI | Hilton Head It
| Others |
| HHI | Hip Hop International
| Others |
| HHI | Hirschman Herfindahl index
| Others |
| HHI | Hirschman Herfindahl indices
| Others |
| HHI | History Hunters International
| Others |
| HHI | Hobbies Helis International
| Others |
| HHI | Holloway Houston Inc
| Others |
| HHI | Holographic Human Interface
| Others |
| HHI | Home Health Intermediary
| Others |
| HHI | Homeless Health Initiative
| Others |
| HHI | Hometown Health Improvement
| Others |
| HHI | Hope Heart Institute
| Others |
| HHI | House Hold Income
| Others |
| HHI | House-Hold Income
| Others |
| HHI | Hrvatski Hidrografski Institut
| Others |
| HHI | Human - Human Interface
| Others |
| HHI | Human Human Interaction
| Others |
| HHI | Human Human Interface
| Others |
| HHI | Human-to-Human Interface
| Others |
| HHI | Humanitarian House International
| Others |
| HHI | Hyundai Heavy Industries
| Others |