Computer hardware and software for transferring data for controlling a cursor; for storing and controlling and checking access to a computer, for preparing a specific user environment on a computer, and for storing and restoring personal data from and to a computer; computers; notebook computers; laptop computers; computer peripherals; electronic personal organizers; remote control devices for computers; remote cursors for computers; mouse input devices linked to computers by cable, radio signals or infrared signals, especially mouse input device to be coupled with a computer, a notebook or a laptop; devices for telecommunication, namely, mobile telephones; devices for wireless radio transmission; blank electronic chip cards; encoded electronic chip cards containing programming used to control and check access to a computer, to prepare a specific environment on a computer, and to store and restore personal data from and to a computer; chip card readers; microcomputers; minicomputers; computer memory; computer interface boards; data processing devices, namely, data processors; computer hardware-based security devices for use with portable and handheld computers; computer software-based security devices for use with portable and hand-held computers; input/output control devices for computers