No there is not. Later, Pat ------------------ Original text From: Dimitri Hammond <dimitri@dynet.com>, on 6/27/98 8:47 AM: I heard somewhere that somehwere in the deep depths of the 83 RAM (or ROM) there is a certain serial number that is specific to each calc, and is different on each one. Is this true? And if so, where is it? Thanx, -Dimitri