IPI
- Faqir of Ipi
- Illinois Policy Institute
- Image Permanence Institute
- Imperial Pacific International
- Income protection insurance
- Indian Political Intelligence
- Industrial Production Index
- Institute for Political and International Studies
- Institute for Private Investors
- Institute of Photogrammetry and GeoInformation
- Integrated Pulmonary Index
- Intellectual Property Institute (United Kingdom)
- Intelligent Peripheral Interface
- Inter-parliamentary institution
- Inter-processor interrupt
- Interested Parties Information
- International Payment Instruction
- International Peace Institute
- International Press Institute
- International Prognostic Index
- International Protein Index
- Inwald Personality Inventory
- Ipi (vizier)
- Ipi Morea
- Ipi people
- Ipi, Waziristan
- Ipili language
- Irish Planning Institute
- San Luis Airport (Colombia)
- Swiss Federal Institute of Intellectual Property