Think of upper case in things like DEFCLASS as literals -- I
don't mean to imply that actual upper case would be used. ``Thing*''
means zero or more occurrences of thing; ``thing+'' means one or more.
Curly brackets { and } are used for grouping, as in {a b}+, which
means a b, a b a b, a b a b a b, etc.
CLISP specific note: Before using CLOS, you need to
enter ``(USE-PACKAGE "CLOS")''.
CMUCL specific note: /usr/lib/cmucl/lisp.core should point to /usr/lib/cmucl/pcl-lisp.core or you could have build a custom image with pcl.