A Programmer's Guide to COMMON LISP

&rest apples args arguments backquote backward chaining bicycle bike body CAR and CDR car list chapter Chomper command COMMON LISP compiler cond condition descriptors cons cell created current-column current-line declarations defdescriptor defined defmacro DEFPARAMETER defrule DEFSTRUCT defun defvar dolist dotimes element engine engine-wont-start equalp error eval evaluated example expert system Figure form-newline format nil funcall function binding function call function object gear-ratio goal gumballs hash tables inference engine input input-stream iteration keyword lambda expression lambda list leaks-to left-margin LISP object LISP's macro main-loop make-name mapcar MY-COUNT MY-FUNCTION my-stream NIL NIL NIL NTHCDR null operations optional Otto output output-stream package pointer predfun predicate pretty-printing problem progn property list read-line recursive rule rules-being-run seal-leaks-to seal-subst seals selectors setf setq specify stream string symbol takes text-width variable vector wheel-size WITH-OPEN-FILE word Write a procedure x-position