Abstract: The invention relates to a multimedia system having a computer, which has a browser for accessing an address, in particular an IP address, a card reader connected to the computer and at least one data card having a card code and insertable in and readable by the card reader, the card reader producing a data signal dependent on the card code for the computer. The data signal of the card reader is designed so that it corresponds to keyboard signals for the direct control of the browser using a certain address.

Abstract: Method and data carrier for storing and reading a data code, wherein at least two information tracks of electrically conductive material are printed onto a substrate in such a way that by parallel reading of the at least two information tracks a clock signal and a data signal are determined, by means of which the data code is formed. The clock signal is here formed by logic ORing of the information tracks and the data code is determined by interpreting the information tracks taking account of the clock signal.