DCI may be an abbreviation for:
Technology D-chiro-inositol, an isomer of inositol Data, context and interaction, an architectural pattern in computer software development Data center interconnect, a connection between data centers Digitally controlled impedance, a control function in FPGAs Display Control Interface, a computer graphics device driver standard developed using code from San Francisco Canyon Company Ductile cast iron, or ductile iron, a more flexible type of cast iron dCi (direct Common-rail Injection), Renault/Nissan's common rail fuel injection technology for diesel engines
Businesses Digital Cinema Initiatives, a consortium to establish a specification for a standard digital cinema architecture Discovery Communications, an American global media and entertainment company Dynamic Cassette International, a Boston, Lincolnshire, UK company that produces products under the Jet Tec brand name DCI Cheese Company Dolphin Capital Investors, a real estate investment company Diners Club International, a global charge card Défense Conseil International, a French international services company in the field of defense and security
Organizations DCI (Wizards of the Coast) (formerly Duelists' Convocation International, now Wizards Play Network), tournament sanctioning body for games including Magic: The Gathering Defence for Children International, a children's rights organization Dental Council of India, an organisation regulating dental education Dialysis Clinic, Inc, a nonprofit medical organization Drum Corps International, the nonprofit organization governing modern junior drum and bugle corps DCI Global Partnerships, a Christian charity organization Distressed Children & Infants International, a nonprofit organization Criminal Investigation Department (Kenya), Directorate of Criminal Investigations (DCI), a department within the Kenya Police
Other Dade Correctional Institution, a prison in Florida Development Cooperation Instrument, a financial construct of the European Union Director of Central Intelligence, formerly the head of the U.S. Intelligence Community and Central Intelligence Agency Detective chief inspector, a police rank in the United Kingdom Decompression illness, brought on by rapid decompression Defence Capabilities Initiative, a 1999 NATO plan to ensure the effectiveness of multinational operations DCI, the number 601 in Roman numerals District of Columbia International School, a charter school in the District of Columbia