Prestel
System videotex developed in Great Britain.
Proof Security
Methodology that complements the cryptanalysis by mathematical proofs of absence of faults.
Scart
Sheet with 21 pins, to make all the connections visual (sound and image). All televisions are filled.
Optical prism
The technique of optical prism is used in some displays in relief. It involves placing a network of filters to screen display, which is not equal to the width of a pixel or half a pixel. These filters act on the points of the image, and change the angle at which they are seen. Thus, if the viewer is placed at the proper distance, we see two images simultaneously in one, the pixels of the one being observed by his left eye, those of the other by his right eye, and thus the image appears in relief
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