In keeping with the practice of adopting secret letters or symbols such as Skull and Bones' "322," Manuscript's "344," and the Pundits' "T.B.I.Y.T.B," Scroll and Key is known to use the letters "C.S.P. and C.C.J." [REF].
Members of the society sign letters to each other "YiT", as opposed to Skull and Bones' "yours in 322" [REF].