A semi-mythical organisation of wizardly LISP and Scheme hackeRS. The name refeRS to a mathematical formalism invented by Alonzo Church, with which LISP is intimately connected. There is no enrollment list and the criteria for induction are unclear, but one well-known LISPer has been known to give out buttons and, in general, the *membeRS* know who they are. [Jargon File]