Not really. Pull the batteries. Memory erases. Password gone. No deterrent there. >Is there anyway that you can make a program (or if there is one already >made) to ask for a password to have access to the use of the TI-89 upon >turning it on? Coz i think that this is an expensive Calc and to have it >stolen would be.....well..........shit!....hopefully the password thing >will deter the "thief".