PPI
PPI may refer to:
Science and technology
Biochemistry
- PPi, the anion P2O74−, a pyrophosphate
- Polyproline I helix
- Protein–protein interaction
Medicine
- Patients and public involvement (PPI), UK
- Prepulse inhibition, of a later pulse
- Proton-pump inhibitor, a medication
- Psychopathic Personality Inventory, a personality test
- Psychophysiological Interaction, fMRI analysis technique
Computing
- Parallel Peripheral Interface, of the Blackfin processor
- Programmable Peripheral Interface, Intel 8255 chip
- Programmable Peripheral Interconnect, in Nordic nRF microcontrollers
- Pixels per inch, of a display
Other science and technology
- Gabarit passe-partout international, in railways
- Picks per inch, a unit of textile measurement
- Plan position indicator, radar display
- Polymethylene polyphenylene isocyanate
Business and organizations
- Italian People's Party (1919) (Partito Popolare Italiano), a political party
- Italian People's Party (1994) (Partito Popolare Italiano), a political party
- Peace Party of India, Uttar Pradesh
- Perusahaan Perdagangan Indonesia, trading company
- Philips Phonographische Industries, later Philips Records
- Phonographic Performance Ireland, music licensing company
- Pirate Parties International
- Polly Peck International, former UK company
- Primarily Primates, primate sanctuary, Texas, US
- Productivity Products International, US software company later renamed Stepstone
- Progressive Policy Institute, U.S.
- Pakistan Press International, a news agency
Other uses
- Pareto priority index, to prioritize projects
- Payment protection insurance
- Positive polarity item
- Producer price index
- Pulse Polio, immunisation campaign in India
- Port Pirie Airport, IATA airport code "PPI"
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