Hsi

Hang Seng Index (Hong Kong)
Found on http://www.numa.com/ref/acronym.htm

HSI

Hue, Saturation, Intensity
Found on http://www.encyclo.co.uk/visitor-contributions.php

HSI

Horizontal Situation Indicator
Found on http://www.encyclo.co.uk/visitor-contributions.php

HSI

Health Services International
Found on http://www.encyclo.co.uk/local/20895

HSI

Horizontal Situation Indicator
Found on http://www.f-16.net/glossary-H.html

HSI

Horizontal Situation Indicator. A cockpit navigation display, usually part of a flight-director system, which combines navigation and heading.
Found on http://airodyssey.net/reference/glossary/
No exact match found