The tetrad shows the technology of the DVD player. This device uses laser technology to read codes to produce a picture and provide clear visual projection for movie viewing. The technology replaces the VCR and the Laser Disc where this technology evolved from. The DVD player is finding itself fading away to the Blue Ray player that applies digital reading technology.
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Het Michael, I liked your tetrad for the DVD player. What technology did you use to create your tetrad? Also, when you compare with my tetrad, what comparison can you make?? Thanks
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