Ππ Pi is a letter in the Greek alphabet of Earth, originating in the early period of Human history.
- Astronomical nomenclature
- Pi Canis Majoris, a star in the Beta Quadrant
- Pi³ Orionis, a star
- Pi Hydrae, a star system
- Pi Piscis Australis, a star system
- Command codes
- "Barclay-pi-3", used to transfer controls to hologrid program
- "Janeway-pi-1-1-0", used to initiate/terminate self-destruct sequence and as a command override
- "Janeway-pi-alpha"
- "Pathway-pi-2", a computer pathway on a Borg cube
- "Tuvok-pi-alpha", a security override to enter another's quarters
- Mathematics
- Pi (number), the mathematical term
- Production reference
- Antares Pi IV, an unreferenced planet
- See also
- Pi (starship), a Romulan scout ship
- PI, abbreviation and slang for a private investigator
- Pie, a typically delicious dessert