PCI

PCI may refer to:

Business and economics

Payment card industry, businesses associated with debit, credit, and other payment cards
- Payment Card Industry Data Security Standard, a set of security requirements for credit card processors
Provincial Competitiveness Index, a governance index of Vietnamese provinces
Pulse of Commerce Index, a U.S. economic indicator based on trucking fuel consumption

Paralympic Committee of India, which selects athletes to represent India at international athletic meets
Pharmacy Council of India, a statutory body in India
Presbyterian Church in Ireland, a Protestant denomination in Ireland
Project Concern International, a humanitarian organization
Public Communications Inc., a Chicago-based national public relations agency
Post Carbon Institute, an organization advocating a more resilient, equitable, and sustainable world
Parti Communiste Internationaliste or Internationalist Communist Party, a French political party
Partito Comunista Italiano or Italian Communist Party, a former Italian communist party
Pentecostal Collegiate Institute (New York) 1900–1903
Pentecostal Collegiate Institute (Rhode Island) 1902–1918
Porter and Chester Institute, a technical school in Connecticut and Massachusetts

picocurie (pCi), a measure of radioactivity
Peripheral Component Interconnect (also known as conventional PCI), a computer bus
Protocol-control information, in telecommunication

Percutaneous coronary intervention, a set of procedures used to treat coronary heart disease
Potato carboxypeptidase inhibitor, a natural peptide usable for thrombolytic and cancer therapy
Prophylactic cranial irradiation, a management option for certain types of aggressive cancers
Protein C inhibitor, a serine protease inhibitor
Photochemical internalization, a light-triggered drug delivery method