Conversion to Uppercase
When symbols are read by Common Lisp they are converted to upper
case. Note carefully that this remark applies to the characters in
symbols. The characters in strings are not converted upper case.
To type a symbol containing lower case characters you can enclose the
symbol in vertical bars, as in |AbC| or you can put a ``backslash''
before each lower case character you wish to preserve, as in A\bC.
|AbC| and A\bC are two different ways of writing the same symbol
(just like 2/4 and 1/2 are two different ways of writing the same rational and
123 and 0123 are two different ways to write the same natural number). The
symbol has three characters in its name, the middle one of which is a lower