By R. G. Loomis, J. Rubin
Communications of the ACM,
Vol. 6 No. 11, Page 668
An increasing number of computer programs are designed to accept and translate a symbolic, English-like language which facilitates communication between the user and the computer. A common feature of such programs is a pre-determined vocabulary of expressions for specifying the input to the program. This note describes a generalized technique for permitting flexible abbreviation of such expressions in order to further simplify the task of writing source programs.
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