‎HCI (with the last character being uppercase “i”, not lowercase “L”) may refer to:

Computing[link]

• Home Computer Initiative, a United Kingdom government programme designed to increase the use of computers in the home
• Host controller interface, a defined and usually standardized interface between a host computer and a USB, Firewire bus adapter
• Host Controller Interface between host computer and Bluetooth controller
• Human–computer interaction, the study of how people interact with computers
  • Human-computer interaction (security), the study of how people interact with computers concerning information security

Science and technology[link]

• Highly charged ion, an ion in very high charge states due to the loss of many or most of its bound electrons
• Hot carriers injection, a phenomenon in solid-state electronic devices when charge carriers gain enough potential energy to overcome potential barrier(s) and migrate to a different area of the device

Organizations[link]

• Handgun Control, Inc., the former name of the Brady Campaign to Prevent Gun Violence
• Health Communications, Inc., an American publishing house
• Human Concern International, a Canadian organization working in international development and emergency relief assistance since 1980

Schools[link]

• Harbord Collegiate Institute, a school in Toronto, Canada
• Humberside Collegiate Institute, a school in Toronto, Canada
• Hwa Chong Institution, a prestigious school located in Singapore

See also[link]

• Hydrogen chloride, whose chemical symbol is HCl (with the last letter being lowercase “L”)
• HCL (disambiguation)

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