TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Component: The bolt assembly also includes a power storage mechanism, i.e. a battery (22). The disengagement mechanism is included in the head, the nut or the screw thread of the shank. It is adapted for use more than once or single use. The material in the disengagement mechanism is adapted to be activated by wireless command. The head is separate from the shank that is adapted for engagement during assembly. The shank contains a socket (30). The device includes an operator authorization mechanism adapted to require biometric identification and/or entry of a code and a bolt assembly identification mechanism. It is adapted to activate disengagement of the bolt assemblies. It is designed to activate disengagement of the bolt assemblies in a chosen sequence.Preferred Method: The activation step follows a wireless command, using energy from magnetic, ultrasonic, infrared or radio frequency energy.    TECHNOLOGY FOCUS - ELECTRONICS - Preferred Component: The computer system also includes a third enquiring mechanism for enquiring as to the identification of a user; a third receiving mechanism for receiving identification data from the user; a third database for comparing the identification data with stored data; an inactivating mechanism for inactivating further use of the computer system if the identification data is not found in the database; a fourth enquiring mechanism for enquiring as to history of the target; a fourth receiving mechanism for receiving the history data; a storage mechanism for storing the history data; a limiting mechanism for limiting use of the computer system according to a predetermined type of user; a transfer mechanism for transferring data to a third party; and an obtaining mechanism for obtaining payment from a third party fund. The target is a chip in the bolt assembly. The command effects activation of the material.Preferred Method: The method may include enquiring as to the identification of a user; receiving identification data from the user; comparing the identification data with stored data in a database; and authorizing the change in the status. It further includes enquiring as to the history of the target; receiving the history data from the target; optionally, storing the history data in the database; transferring data to a third party; requesting transfer of funds from a third party fund; and authorizing acceptance of the funds to a nominated fund.    TECHNOLOGY FOCUS - METALLURGY - Preferred Material: The material can be a shape memory alloy.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The material can be a heat-activatable epoxy resin.