TCI

TCI may refer to:

Locations

 * Tenerife Airport (disambiguation), airport code of Tenerife International Airport (1964–1978), still used as a code for the island of Tenerife in general
 * Turks and Caicos Islands, UNDP country code

Psychology

 * Temperament and Character Inventory (TCI) of personality traits
 * Theme-centered interaction, a method for social learning in groups
 * Therapeutic Crisis Intervention, protocol used in residential childcare facilities

Organizations and companies

 * Tall Clubs International, organization of clubs of tall people in North America
 * Tele-Communications Inc., former US cable television company
 * Telecommunication Company of Iran
 * Televisione Cristiana in Italia, an Italian religious television channel
 * Telus Communications Inc., a Canadian telecommunications subsidiary of Telus Corporation
 * Tennessee Coal, Iron and Railroad Company, former steel manufacturer, Alabama, USA
 * Texas Correctional Industries, division of Texas Department of Criminal Justice, USA
 * The Children's Investment Fund Management, UK hedge fund management
 * Thistletown Collegiate Institute, a school in Toronto, Canada
 * Touring Club Italiano
 * Toyota Canada Inc.
 * Transport Corporation of India
 * Transportation and Climate Initiative, a proposed interstate compact

Other

 * Tag Control Information, a data field in IEEE 802.1Q VLAN tagging
 * Taoist Church of Italy, a confessional religious body of Taoism in Italy
 * Target controlled infusion, a method of administering general anaesthesia