| HSI | H Savy Insurance 
| Others |
| HSI | H323 Service Interface
| Others |
| HSI | H323 Signaling Interface
| Others |
| HSI | Habitat Suitability Index
| Others |
| HSI | Handling Speed Intelligently
| Others |
| HSI | Handmade Software Inc.
| Others |
| HSI | Handmade Software Inc. Bitmap graphics file
| Others |
| HSI | Handmade Software, Inc.
| Others |
| HSI | Hang Seng Index
| Others |
| HSI | Hardware Software Integration
| Others |
| HSI | Harmony School Of Innovation
| Others |
| HSI | Harsh Squirrel Interaction
| Others |
| HSI | Hastings, Nebraska USA
| Others |
| HSI | Health and Safety Inspector
| Others |
| HSI | Health Safety Institute
| Others |
| HSI | Health Science Institute
| Others |
| HSI | Health Sciences Institute
| Others |
| HSI | Health Service Indicator
| Others |
| HSI | Health Services Inspection
| Others |
| HSI | Health Status Index
| Others |
| HSI | Health Systems Innovation
| Others |
| HSI | Health Systems Institute
| Others |
| HSI | Hearing and Sight Impaired
| Others |
| HSI | Heating Solutions International
| Others |
| HSI | Heaviness of Smoking Index
| Others |
| HSI | Hierarchical Storage Interface
| Others |
| HSI | High School Institute
| Others |
| HSI | High Signal Intensity
| Others |
| HSI | High Speed Input
| Others |
| HSI | High Speed Interceptor
| Others |
| HSI | High Speed Internet
| Others |
| HSI | High-Speed Internal Clock
| Others |
| HSI | High-Speed Internet
| Others |
| HSI | Highly Skilled International
| Others |
| HSI | Highway Structures Information
| Others |
| HSI | Highway System Inc.
| Others |
| HSI | Highway System Information
| Others |
| HSI | Hispanic Servicing Institute
| Others |
| HSI | Hispanic Serving Institutions
| Others |
| HSI | Historical Scene Investigation
| Others |
| HSI | Hogwarts Slightly Improved
| Others |
| HSI | Homeland Security Investigations
| Others |
| HSI | Honda Stream Indonesia
| Others |
| HSI | Honeypops Sweet Inspirations
| Others |
| HSI | Honor Strength Integrity
| Others |
| HSI | Hop Storage index
| Others |
| HSI | Horizontal Sampling Interval
| Others |
| HSI | Horizontal Situation Indicators
| Others |
| HSI | Hospitality Solutions International
| Others |
| HSI | Host Specific Interface
| Others |
| HSI | Hot Surface Igniter
| Others |
| HSI | Hot Surface Igniters
| Others |
| HSI | Hot Surface Ignition
| Others |
| HSI | Housing and Services Inc
| Others |
| HSI | Houston Service Industries
| Others |
| HSI | Hudson Smith International
| Others |
| HSI | Hue Saturation and Intensity
| Others |
| HSI | Hue Saturation Intensity
| Others |
| HSI | Hue, Saturation, and Intensity
| Others |
| HSI | Human Services Infrastructure
| Others |
| HSI | Human System Interface
| Others |
| HSI | Humane Society International
| Others |
| HSI | Hybrid System Indicator
| Others |
| HSI | Hybrid System Information
| Others |
| HSI | Hydro Service International
| Others |
| HSI | Hyper-Spectral Imagery
| Others |