(?
 **
 ***
 ++
 +++
 :LESSON
 :TEACH
 :TEACH:LISP
 :TEACH-LISP
 APROPOS
 DESCRIBE-ERROR
 EXAMINE-LIST
 HELP
 INFO
 LESSON
 DISPLAY-LIST
 QUIT
 SCRIPT
 STOP
 STOP-SCRIPT
 TEACH
 TEACH-LISP)