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

Medicine

• Target controlled infusion, a method of administering general anaesthesia

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

Religion

• Taoist Church of Italy, a confessional religious body of Taoism in Italy

Technology

• Tag Control Information, a data field in IEEE 802.1Q VLAN tagging

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 Ltd
• Transportation and Climate Initiative, a proposed interstate compact