Do you still have the calculator ? And perhaps a picture of it, as I really don't know what the ,model designation means. And finally, a manual of operation ? My interest is sentimental. Paul Touchette Paul E. Touchette, Psychologist Developmental Disabilities Service Department of Pediatrics University of California, Irvine voice: 714-957-5487 fax: 714-957-5354 petouche at uci.edu