HSI
HSI commonly describes high‑speed internet connections, the Hong Kong Hang Seng Index in finance, Homeland Security Investigations in law enforcement, and the global animal‑rights group Humane Society International.
Medical
Hospitality Solutions International
High Signal Intensity
Heaviness of Smoking Index
Health Status Index
Health Service Indicator
Hogwarts Slightly Improved
Miscellaneous
Handling separation and insignificance
Hot Surface Igniters
Honor Strength Integrity
Houston Service Industries
Hierarchical Storage Interface
Habitat Suitability Index
Homeland Security Investigations
Hue, Saturation, and Intensity
Community
Human Services Infrastructure
Harmony School Of Innovation
Harsh Squirrel Interaction
Honeypops Sweet Inspirations
Governmental
Hyper-Spectral Imagery
Horizontal Situation Indicators
Hot Surface Ignition
Health Services Inspection
Health Sciences Institute
Hispanic Serving Institutions
Health Safety Institute
Historical Scene Investigation
Health Systems Institute
Horizontal Situation Indicator
High Speed Interceptor
Hearing and Sight Impaired
Academic & Science
Regional
Computing
Handmade Software Inc. Bitmap graphics file
Hue Saturation Intensity
Handling Speed Intelligently
High Speed Interconnect