Information technology has a long history. Signs informed us long before the development of electronics and signs of all kinds continue more than ever to establish the environment in which we conduct our lives. It is to be expected that gradually newer technologies will offer substitutes for the signs we already have, but the purpose and principles of signs will remain. This is a quick look at existing signs to see what generalizations can be revealed. Ultimately the conclusion is that signs allow authorities to express their wishes at a distance. The video is derived from a lecture given at an Open University seminar on the topic of information; it is compressed into the ten minute limit of youtube and therefore rushes over some topics.
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