Master Key - a small Newton Extension that adds functionality to the existing Newton password/PIN protection. It should only be added to the Internal store of a newton and not onto memeory cards as removing the card will remove the functionality. It adds a '"Master Key" Preference to the general Newton Prefs after it is installed. This means as well as the normal PIN number working another "Master" PIN number will also get you through the start-up screen. This is only for use with existing Newton Message PADs 120s and 130s that are running version 2.0 of the operation system. This extension is mainly useful for vertical markets and System administrators who have to control a number of Newtons which need to be password protected for their data but also have the need for the users to be able to change their own PIN numbers in the Normal way.