On May 30, 3:53 pm, koeh... at eisner.nospam.encompasserve.org (Bob Koehler) wrote: > On the other hand, I've yet to find out how to build actual data > structures in Lisp, other than the built-in cons cell. VAX LISP? Here it goes (DEFINE-ALIEN-STRUCTURE sm-desc "descriptor for shared memory" (length :UNSIGNED-INTEGER 0 4) (address :POINTER 4 8))