'''HCI''' may refer to: {{TOC right}} ==Computing== * Happy Computers, an American computer hardware manufacturer * Home Computer Initiative, a United Kingdom government programme to increase computers usage * Host controller interface (disambiguation), various computer interfaces * 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 * Hyper-converged infrastructure, an IT infrastructure framework for integrating storage, networking and virtualization computing in a data center.
==Education== * Harbord Collegiate Institute, a school in Toronto, Canada * Humberside Collegiate Institute, a school in Toronto, Canada * Hwa Chong Institution, a school in Singapore
==Science== * Highly charged ion * Hot carriers injection, in solid-state electronic devices * Hydrocarbon indicator, in reflection seismology
==Organizations== * Handgun Control, Inc., the former name of the Brady Campaign to Prevent Gun Violence * Harrisburg City Islanders, a soccer club from the United States * HCI Books (Health Communications Inc), an American publishing house, see ''What the Bleep Do We Know!?'' * Human Concern International, a Canadian relief and development organization * Huntsman Cancer Institute, an American cancer research facility and hospital
== Other uses == * Heavy-Chemical Industry Drive, a former economic development plan of South Korea
==See also== * HCL (disambiguation) * HCIL (disambiguation) * HCl (H-C-lowercase L), chemical formula of Hydrogen chloride
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