HSI can refer to different things depending on the context. Here are some possible meanings of HSI based on the search results:

• Homeland Security Investigations: HSI is a division of the U.S. Department of Homeland Security that investigates cross-border criminal activity, including human trafficking, drug smuggling, and cybercrime.

• Hispanic-Serving Institutions: HSIs are colleges and universities in the United States that have a high percentage of Hispanic students. These institutions receive federal funding to expand educational opportunities and improve the academic attainment of Hispanic students.

• Hang Seng Index: HSI is a stock market index that tracks the performance of the largest companies traded on the Hong Kong Stock Exchange. It is widely considered a benchmark for the Hong Kong equity market and Asian markets more generally.

• Health and Safety Institute: HSI is a company that provides e-learning content, training, and cloud-based software tools for environmental health and safety (EHS) management, safety training, and compliance.

Therefore, the meaning of HSI depends on the context in which it is used.