PDI
PDI is an abbreviation for:
- Paul Drude Institute for Solid State Electronics , a research facility in Berlin
- Partai Demokrasi Indonesia , former Indonesian party
- Policía de Investigaciones de Chile , the Chilean criminal police
- Pentaho Data Integration, is an ETL tool from the Pentaho Business Intelligence Suite
- Periodontal Disease Index, see Periodontal Screening Index
- Powered Descent Initiation , landing maneuver of the Apollo Lunar Module
- Protein disulfide isomerase , an enzyme