8. A system according to claim 7, comprising a keyboard providing data in the standard code and connected to the display screen by way of the processing unit.
7. A system according to claim 6 comprising a cathode ray display tube; an input buffer for receiving a flow of data from a data-processing system to which it is connected; and an output buffer via which the system is connected to the last-mentioned data-processing system; and the display screen acts as store and is connected to the output buffer by way of a processing unit adapted to convert the displayed data presenting in all the forms of the characters of the second alphabet into a flow of data coded in standard binary code.