What does PI stand for?

The list of PI abbreviation meanings.

Stands For|1.1kAbbreviated As|0Related|0
124
Principal Investigator(Celestial objects, Astronomy, Army)
28
Process Integration
22
Private Investigator
22
Private Investigations
22
Product Information
21
Processing Instruction
21
Personal Information
21
Physik Instrumente
21
Performance Improvement
20
Personality Inventory
20
Private Investigator's
20
Private Investigators
20
Private Investigative
20
Product Integration(Technology)
19
Process Information
18
Personal Interview
18
Package Insert
17
Pacific Islands
16
Protein Identification
16
Prescribing Information
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APASmart Define. (2018). pi. Retrieved September 20, 2026, from http://smartdefine.org/pi/abbreviations/f
ChicagoSmart Define. 2018. "pi" http://smartdefine.org/pi/abbreviations/f (accessed September 20, 2026).
HarvardSmart Define 2018, pi, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/pi/abbreviations/f>.
MLASmart Define. "pi" 2 February 2018. Web. 20 September 2026. <http://smartdefine.org/pi/abbreviations/f>