TDOP PrattTop Down Operator Precedence Vaughan R. Pratt Massachusetts Institute of Technology 1973 Work reported herein was supported in part at Stanford by the National Science Foundation under grant no GJ 992, and the Office of Naval Research under grant number N-00014-67-A-Oll2-0057 NR 044-402; by IBM under a post-doctoral fellowship at Stanford; by the IBM T.J. Watson Research Center, Yorktown Heights,
