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Thinking of codes, the first things coming to mind are spies, special agents or cryptographs. In a sense, however, we are surrounded bei codes. Every day and at every time. We have already learned to decipher some of them, before being able to read or write. They have become so self-evident, that we do not recognise them as enciphered, because we are able to decipher them at once. Traffic signs are one example. Or traffic lights. Only people having learned the meaning of red or green respectively, are able to decipher traffic lights. In my Book I illustrate the big spectrum of signs, codes, coding methods and decoding methods.
Prof. Robert Paulmann