* the whole set of possible computations in the repertoire of the Universal Computer ⇒ Universality
PRATT, Vaughan R., 1973. Top down operator precedence. In: Proceedings of the 1st annual ACM SIGACT-SIGPLAN symposium on Principles of programming languages. 1973. p. 41–51, p. 45.
Exhibit the Tree recovered by the Parser (Pratt, Top Down Operator Precedence, p. 48.)