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Weierstrass p (also called "pe"), a mathematical letter (℘) used in Weierstrass's elliptic functions and power sets •
Péclet number (abbreviated "Pe."), a dimensionless number used in physics •
Pe (text editor), a text editor for BeOS •
Petlyakov, Russian aircraft design bureau •
Pulmonary emphysema, a lung disease •
Pulmonary embolism, a medical condition •
Portable Executable, a Microsoft Windows executable file format •
Provider edge router, an edge network router •
Polyethylene, a type of plastic ==Places==