The symbol of the Phi Beta Kappa Society is a golden key engraved on the obverse with the image of a pointing finger, three stars, and the Greek letters from which the society takes its name. On the reverse are found the initials "SP" in script. One official historian of the society, William T. Hastings, and some others believe that the "S" and "P", which stood for "Societas Philosophiae", "Philosophical Society", was the original name of the Society and that "Phi Beta Kappa" came only over time to be taken as the name of the society. The heading on the original list of members states, "A List of the members, who have been initiated into the S.P. alias Phi Beta Kappa Society."