Cour pénale internationale (International Criminal Court)

Central Port Injection, see fuel injection

Center for Public Integrity

Cost Performance Index - the ratio of actual costs to budgeted costs, used in Earned Value Management

Communist Party of India

Communist Party of Ireland

Communist Party of Israel

Congrès paléoethnologique international (International Union for Prehistoric and Protohistoric Sciences)

Commission on Public Integrity, an independent Iraqi anti-corruption committee

Cost Per Impression

Cycles Per Instruction in microprocessors

California Psychological Inventory

CPI Aero, a New-York based defense contractor

Communist Party of Iran

Computer Peripherals Inc, a former manufacturer of computer printers

Complete Packet Inspection, technology for computer network traffic analysis that combines header classification and payload pattern search

Coherent Processing Interval, a parameter used to describe radar systems

Collaboration Properties, Inc. the intellectual property holding company for Avistar

Committee on Public Information, an American governmental organization during World War I

Corruption Perceptions Index, List by CPI

CPI is the ICAO airline designator for Compagnia Alimentare Italia, Italy