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
Hogwarts Slightly Improved
Health Service Indicator
Health Status Index
Heaviness of Smoking Index
High Signal Intensity
Hospitality Solutions International
Miscellaneous
Hue, Saturation, and Intensity
Homeland Security Investigations
Habitat Suitability Index
Hierarchical Storage Interface
Houston Service Industries
Honor Strength Integrity
Hot Surface Igniters
Handling separation and insignificance
Community
Honeypops Sweet Inspirations
Human Services Infrastructure
Harsh Squirrel Interaction
Harmony School Of Innovation
Governmental
Horizontal Situation Indicators
Hot Surface Ignition
Health Services Inspection
Hearing and Sight Impaired
High Speed Interceptor
Hyper-Spectral Imagery
Horizontal Situation Indicator
Health Systems Institute
Historical Scene Investigation
Health Safety Institute
Hispanic Serving Institutions
Health Sciences Institute
Academic & Science
Regional
Computing
Handmade Software Inc. Bitmap graphics file
Hue Saturation Intensity
Handling Speed Intelligently
High Speed Interconnect