Ππ Pi was a letter in the Greek alphabet of Earth, originating in the early period of Human history.

Astronomical nomenclature

• Pi¹ Cancri, a star system
• Pi Canis Majoris, a star system
• Pi Hydrae, a star system
• Pi Mensae, a star system
• Pi³ Orionis, a star system
• Pi Piscis Australis, a star system
• Pi¹ Ursae Majoris, 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