HSI

HSI may refer to:

Science and technology

 * Hardware Security Integration
 * HSI color space, used in computer vision applications
 * Heterosubtypic immunity
 * High Speed Interconnect, a Nvidia computer chip
 * Horizontal shaft impactor, a type of rock crusher
 * Horizontal situation indicator, an aircraft instrument
 * Hurricane Severity Index
 * Hyperspectral imaging

Other uses

 * Hsi (surname), various Chinese surnames, romanized Xi in Pinyin
 * HSI (track team)
 * Croatian Syrmian Initiative (Hrvatska srijemska inicijativa), an ethnic-Croat political party in Serbia
 * Croatian World Games (Hrvatske svjetske igre), multi-sport international event
 * Hang Seng Index, a stock market index
 * Hastings Municipal Airport, in Hastings, Nebraska, United States
 * Hispanic-serving institution, an American college designation
 * Homeland Security Investigations, U.S. federal law enforcement agency
 * Horizon Services, an American rehabilitation clinic
 * Humane Society International, nonprofit organization for animal welfare
 * Icelandic Handball Association (Handknattleikssamband Íslands, HSÍ)
 * Horizontal situation indicator, (aircraft avionics)