Scheme 84 at Indiana had a notion of cells essentially identical to that proposed by Ostheimer & Nikhil. We had objects called "refs". (REF val) created a ref initially containing val (DEREF ref) got the contents (SET-REF! ref val) changed the contents. Mitchell Wand College of Computer Science Northeastern University 360 Huntington Avenue #161CN Boston, MA 02115 CSNet: wand@corwin.ccs.northeastern.edu