A device for selecting data from a plurality data sources such as credit cards check cards customer cards identity cards documents keys access information and master keys

摘要

This invention provides a device for selecting data from a plurality of data sources. In connection with a system for credit cards, check cards, customer cards, or the like, it is proposed to provide an electronic multi-function card comprising a storage accommodating a plurality of credit cards, check cards, customer cards, or the like, it is proposed to provided an electronic multi-function card comprising a storage accommodating a plurality of individual data sets representing individual single-purpose cards, and comprising at least two display boxes in which data can be displayed by electronic activation, and further contact means accessible from the outside which enable the data sets stored at any time to be pages through successively and the individual data of each single-purpose card to be displayed in the display boxes, and permitting further the entry of a secret code and finally, the data sets and/or individual parts of a secret code and, finally, the data sets respectively.