ESP means "Extra Sensory Perception." The meaning is clear: obtaining knowledge via means not associated with our normal senses. Such things are also known as "psi" phenomena. The Greek letter Psi is used for this. ESP comes in various forms.

Clifford Pickover ESP Experiment


A Princeton Lab on ESP Plans to Close Its Doors

Zener Cards

By the way, Zener cards are named for Swiss psychologist Dr. Karl Zener (1903-1963) who developed the cards for J.B. Rhine's ESP tests.

Scene from "Ghostbusters"

Two Scenes from "Columbo Goes to the Guillotine"


Moon Mission ESP Test