When reading  code in a new language, work in 2 steps
	Find the familiar
		Look for things you have coded in other languages
		Note, but do not obsess, on the unfamiliar
	Then focus on the unfamiliar.

Example: http://unbox.org/wisp/var/timm/10/ai/share/pdf/code.pdf
	page 1,2
		How to load files
			21 to 76
	page 3,4
		How to read a file, line by line
			98 (with-open file creates a stream)
			102 (reads the next line)
			103 (checks for end of file)
		How to fill in default params in a function call
			101,102 (&optional)
		How to build a list, recursively
			104,105 (cons)
		conditional 
			103 (when)
			132 (unless)
			139,140,141 (if)
		how to find length of a list
			128 (length x)
		how to case on type
			127 (defmethod)
		How to get the nth item out of a list
			128 (nth)
		How to define a local variable
			121 (let)
				: note that 
					: 	(let (a b c d)... ) is the same as
					: (let ((a nil) (b nil) (c nil) (d nil) ...)
				: also
					: lets can be nested (line 133)
		How to to test for nil
			103
		How to test for zero
			132
		How to increment
			133 (1+,)
				: also can be don with incf
		How to decrement
			135 (decf)
		Run over all items in a hash table
			134 (dohash)
	page 5,6
		How to define structures
			146,147
		How to set defaults for slots
			147
		How to customize how structs are printed
			146, 149..153
		How to access struct slots
			152, 152
		How to print 
			151,153 (format)
		How to do disjunctions
			156 (or)
		How to push to front of lisp
			156 (push)
		How to call a function of a list of arguments
			157 and 167(apply)
		How to set a variable
			162 (setf, also can set slot contents)
		How to print an error message
			168 
		How to comment a function
			172
		How to create a struct
			173 (make-caution)
		How to override slot contents
			173
		How to repeat N times
			174	(dotimes)
		How to define a test case
			177 (deftest)
		How to compare integers
			181 (=. see also eq, eql, equal, equalp,string-lessp)
		How to compare strings
			182 (samep. ignores whitespace. defined 200,222
		How to do a conditional
			205 if
		How to return a value from a function
			206, 207: make in the last value. note: the if trap
		How to generate a string
			205 (format nil...)
		How to mention a symbol
			209 #\Space
			215	many examples
		How to check membership of a list
			215 (member)
		How to remove items from a list
			218 (remove-if)