CII

CII or Cii may refer to:


 * 102 (number) in Roman numerals
 * Calculated Ignition Index, an index of the ignition quality of fuel oil
 * Caldera International, Inc., a software company between 2001 and 2002
 * Centro Intelligence Interforze, an Italian intelligence agency
 * Chaîne d'Information Internationale, former name of TV station France 24
 * Chartered Insurance Institute
 * Children's Institute International, a child-abuse organisation in Los Angeles
 * Colour Index International
 * Compagnie internationale pour l'informatique, French computer manufacturer
 * Computer-implemented inventions, see software patent
 * Confederation of Indian Industry
 * Construction Industry Institute
 * Core Infrastructure Initiative, a project started by the Linux Foundation to fund critical open source projects
 * Council of Islamic Ideology, Pakistan Government
 * Cross Industry Invoice, a technical specification developed in UN/CEFACT for creating message syntax used in global exchange between trading partners
 * George M. Low Center for Industrial Innovation, a research center at Rensselaer Polytechnic Institute