PDI

PDI may refer to:

Organisations

• Investigations Police of Chile (Spanish: Policia de Investigaciones de Chile)
• Party for Justice and Integration (Albanian: Partia për Drejtësi dhe Integrim), an Albanian political party
• Pacific Data Images, former US computer animation company
• Paul Drude Institute for solid state electronics, German research institute
• Philippine Daily Inquirer, a newspaper
• Plumbing & Drainage Institute, US
• Ideal Democratic Party, political party in Rwanda
• Partai Demokrasi Indonesia (Indonesian Democratic Party) (1973–2004), a defunct political party
• Polo Democrático Independiente (Independent Democratic Pole), a Colombian democratic political party

Chemistry and biochemistry

• Pyridinediimine, organic compounds used as ligands
• Perylenediimide, a rylene dye
• Photodynamic inactivation, or antimicrobial photodynamic therapy
• Protein dispersibility index, in water
• Protein disulfide isomerase, an enzyme
• Polydispersity index, molecular weight distribution of polymers
• Pentamethylene diisocyanate, a bio-based diisocyanate prepared from pentamethylene diamine

Computing

• Pentaho Data Integration, design data flow software
• Versit Consortium's Personal Data Interchange
• Pop Directional Isolate, Unicode bidirectional text character
• Portable Database Image format (.pdi)
• Atmel Program and Debug Interface

Other

• Postal Development Indicator, a UPU ranking
• Peripheral drift illusion, a motion illusion
• Pilot direction indicator, for aircraft bombing
• Power Distance Index, a measure of social power acceptance
• Powered Descent Initiation, of Apollo moon landing