HSI

HSI may refer to:

In Science and Technology:

• HSI color space, color representation coordinate system meaning Hue, Saturation, Intensity
• High Speed Interconnect, a bridge chip designed by NVIDIA to make PCI Express chips available for the AGP slot, and vice-versa
• High speed internet, broadband internet access
• Horizontal shaft impactor, a type of impact crusher used in mining or materials processing
• Horizontal situation indicator, an aircraft instrument combining navigation and heading information on one display
• Hurricane Severity Index, a scale which measures the severity of a tropical cyclone

In Other uses:

• Homeland Security Investigations, U.S. law enforcement agency, the largest investigative agency of the United States Department of Homeland Security
• Hang Seng Index, a major stock market index in Hong Kong
• Hispanic-serving institution, a college meeting requirements for a U.S. educational financial program for first generation, low income Hispanic students
• Hrvatska srijemska inicijativa (Croatian Syrmian Initiative), local political party of Syrmian Croats in Serbia
• Hsi is also the Wade-Giles spelling of the Chinese name Xi.