2MB preferred, but any working psion 3a or 3c is of interest. please email -- --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - David J.C. MacKay mackay@[EMAIL PROTECTED] http://www.inference.phy.cam.ac.uk/mackay/ Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE. U.K. (01223) 339852 | fax: 354599 | home: 740511 international: +44 1223