Pi, a fictional character in the novel Life of Pi

The symbol for political life used in Boethius' Consolation of Philosophy

The Philippines (from "Philippine Islands")

Pi, or π, is the mathematical constant equal to a circle's circumference divided by its diameter.

Pebi, a Binary prefix

Philippine Idol

Parameter indicator, in ISO standards

π (film), a 1998 film directed by Darren Aronofsky.

An inorganic phosphate group (as P_i)

Photographic interpreter, an aerospace and strategic reconnaissance term

Private investigator

Privacy International

Shorthand for pion

<math>\Pi(x)\,\!</math> (Pi function), the Gamma function when offset to coincide with the factorial

Public intoxication

<math>\pi(x)\,\!</math> (pi function), the prime-counting function

The isoelectric point (as pI)

Primary immunodeficiency

Pasteur Institute

A song from the Kate Bush album Aerial

Page impressions, an online advertising term

Predictive Index

Plasticity Index

Pi, a member of Team Robo in Sega Soccer Slam

Seattle Post-Intelligencer

Osmotic pressure

Piedmont Airlines (1948-1989)

Pi (.hack), a fictional character from the multimedia franchise .hack//G.U.

Pi bond

Primitive Instinct

Pistillata a gene that influences the development of flowers in the ABC Model of Flower Development

Perimeter Institute for Theoretical Physics

P is the sixteenth letter of the modern Latin alphabet. Its name in English is spelled pee or occasionally pe (pronounced...

Polyimide (sometimes abbreviated PI) is a polymer of imide monomers. The structure of imide is as shown. Thermosetting polyimides are commercially available as uncured resins, stock shapes, thin sheets, laminates and machines parts. Thermoplastic...

Pi (letter), the Greek letter

Sun Air (Fiji) (IATA airline code: PI)

Programmed instruction

In legal shorthand, it refers to a Plaintiff

A men's fragrance from Givenchy

Pass interference in American football

Phosphatidylinositol (abbreviated PtdIns, or PI) is a minor phospholipid component in the cytosolic side of eukaryotic cell membranes. Being an amphiphile, this molecule possesses polymorphic behaviour, that is currently a topic of research in academic...

Protease inhibitor

Propidium iodide

Pi (instrument)

Principal investigator

Potential instability

People's Initiative

Parents for Inclusion

"Pi", a song from the Hard 'n Phirm album Horses and Grasses, which the song ends at 3:14

Pi Recordings, a record label

Provider Independent Address Space

Pi County, county in Sichuan, China