Question

The name of a de facto standard for this programming language includes a superscript over the word “Revised”, with the most recent 2013 version (15[1])having a superscript of 7. The minimalist philosophy of this language has caused wildly diverging implementations and led its steering committee to describe it as “the world's most unportable programming language”. This language includes a hygienic macro system via the “syntax-rules” statement, which is not shared by its closest relative. In this language, predicates end in question marks and mutating actions end in exclamation (-5[1])points. (15[1])This is the direct predecessor of the (*) Racket programming language. (-5[1])This language has been (10[1])widely used for introductory programming courses, including at MIT and Berkeley until the 2010s. For 10 points, name this Lisp dialect, the primary (10[1])competitor to Common Lisp whose name suggests a devious plan. ■END■ (10[1])

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