Internal combustion engine, a fuel engine

InterCityExpress, a German high-speed train

U.S. Immigration and Customs Enforcement, U.S. government agency

Institution of Civil Engineers

In-circuit emulator, a computer hardware device

International Cometary Explorer, a former spacecraft

Iowa, Chicago and Eastern Railroad, AAR reporting marks ICE

ICE (cipher), a block cipher in cryptography

IntercontinentalExchange, an Atlanta-based energy futures market

Integrated Collaboration Environment

iCE Advertisements or Insane Creators Enterprises, a digital art group

InterCity Express, Citytrain interurban train fleet in Brisbane, Australia

Intrusion Countermeasures Electronics, data security measures in cyberpunk fiction

In case of emergency, the emergency contact program created after the 7 July 2005 London Bombings

ICE table, used in chemistry to keep track of the changes in moles of the reactants

Iron Crown Enterprises, game-producing company from Virginia, USA

Information Council on the Environment, a Public Relations organization

Digital ICE, "Image Correction and Enhancement", a technology automatically removes surface defects from a scanned image

Independent Commission of Experts, see Bergier commission

In car entertainment

Interactive Connectivity Establishment

Internet Communications Engine, a middleware computer software

Information and Content Exchange, an XML-based protocol

Instituto Costarricense de Electricidad, the Costa Rican Institute of Electricity

International Corpus of English

Izquierda Comunista de España (Communist Left of Spain), a former political party in Spain

Internal compiler error

Inter-Client Exchange, an X Window System protocol framework

ICE (anime), a 2007 original video animation