FPI may refer to:

Government and politics

Federal Prison Industries Federal Prison Industries, Inc. (FPI), doing business as UNICOR (stylized as unicor) since 1977, is a corporation wholly owned by the United States government. It was created in 1934 as a prison labor program within the Federal Bureau of Priso ...

, a US government corporation which employs prison labor * Foreign Policy Initiative, an American think tank *

Foreign Policy Institute The Foreign Policy Institute ( or ''DPE'') is a Turkish think tank on foreign policy and international relations. It was founded in 1974. The Foreign Policy Institute is the first ever think tank formed in Turkey. The founder and the first pre ...

, a Turkish think tank * The Foreign Policy Institute, a research institute at Johns Hopkins University *

Islam Defenders Front The Islamic Defenders Front (; ) was an Indonesian hardline Islamist organization founded in 1998 by Muhammad Rizieq Shihab with backing from military and political figures. Since 2015, Ahmad Shabri Lubis has been the organization's leader, wh ...

(Indonesian: '), an Indonesian political organization * Ivorian Popular Front (French: ') * The Service for Foreign Policy Instruments, a service of the European Commission

Science, engineering and mathematics

Fabry–Pérot interferometer In optics, a Fabry–Pérot interferometer (FPI) or etalon is an optical cavity made from two parallel reflecting surfaces (i.e.: thin mirrors). Optical waves can pass through the optical cavity only when they are in resonance with it. It is ...

* Fast probability integration, a method used in reliability engineering *

Fixed-point iteration In numerical analysis, fixed-point iteration is a method of computing fixed points of a function. More specifically, given a function f defined on the real numbers with real values and given a point x_0 in the domain of f, the fixed-point itera ...

* Fluorescent penetrant inspection * Formal Public Identifier * Freiburger Persönlichkeitsinventar, a psychological personality test

Other uses

* Family and Parenting Institute * Faridpur Polytechnic Institute * Football Power Index * Force Protection Inc, an American military vehicle manufacturer * Foreign portfolio investment *

Free Press of India Free Press of India was an Indian nationalist-supporting news agency founded in the 1920s by Swaminathan Sadanand, during the period of the British Raj. It was the first news agency owned and managed by Indians. Beset by dubious business acumen ...

* Frunze Polytechnic Institute, now Kyrgyz Technical University {{disambiguation