What is on-topic on comp.lang.lisp?

Disscussion of the language defined by the ANSI Common Lisp standard is definitely on-topic on comp.lang.lisp. Unlike comp.lang.c, we do not restrict our discussions to the standard, but also actively discuss the differences between implementations and implementation-specific extensions. Since the Lisp community is remarkably long-lived, discussion of the history and evolution of Lisp tends also to be welcomed, or at least tolerated; discussion of non-standard lisps (though generally not Scheme or Emacs Lisp) is also accepted. Though CLOS (the Common Lisp Object System) has its own newsgroup it is also part of ANSI CL, and so is a valid topic for discussion.