PDI can mean: (in alphabetical order)
Pacific Data Images, the computer graphics company, creator of Shrek
Peripheral Decarboxylase Inhibitor, a medical substance such as
carbidopa.
Personal Data Interchange, the exchange of data between two or more individuals, especially but not solely via computing devicesPersonal
Disposable Income, the amount of an individual's total income left after taxesPeters et al. Delusions Inventory, a means of measuring delusional ideation
Philippine Daily Inquirer, a Philippine newspaperPlastic Drum Institute, a former business unit of the
Society of the Plastics Industry; it might have been replaced by the
Rigid Plastic Packaging InstitutePlumbing & Drainage Institute, a plumbing products manufacturers certification organization
Polydispersity Index, a term in polymer chemistry referring to the molecular weight distribution of polymers
Portable Database Image, file format to store structured databases for reporting and analysis in a highly compressed way
Pre-Delivery Inspection, an inspection performed on a car, home, or other item to be sold
Protein Dispersibility Index, a means of comparing the solubility of a protein in water.
Protein Disulfide Isomerase, an enzyme in the endoplasmic reticulum
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