The meaning of the Acronym PIE is...

PIE is

• People Institutes And Experiments
• Physics Is For Everyone
• Persons Institutes Experiments
• Partners for Inclusive Employment

More Meanings For PIE:

• Process Instance Evolution
• Propagation Infection And Execution
• Picture Information Extractor
• Polymorphism Inheritance Encapsulation
• Pocket Internet Explorer
• Post-Irradiation Examination
• Program Implementation Experience
• Pie Isnt Echo
• Python Internet Engine
• Position Independent Executable
• Pointers In Email
• Public Internet And Email
• Personal Interactive Electronics
• Principle Of Inclusion And Exclusion
• Possibility of Infinite Energy

PIE is also in:

• Chat
• Electronics
• General
• Mathematics
• Physics
• Security
• Software