LPI
- Dye penetrant inspection
- Energy-Efficient Ethernet
- Glaucoma surgery
- LPI Media
- La Paz incident
- Lady Parry Island
- Language Proficiency Index
- Leading pedestrian interval
- Leaf plastochron index
- Legatum Prosperity Index
- Liga Primer Indonesia
- Limited Price Indexation
- Linear partial information
- Lines per inch
- Linköping/Saab Airport
- Linus Pauling Institute
- Linux Professional Institute
- Living Planet Index
- Logistics Performance Index
- Low probability of intercept radar
- Lunar and Planetary Institute
- Lysinuric protein intolerance
- Lysophosphatidylinositol
- Pyramide Inversée