State-Transition Based Models
First a natural language, generally English, was used to describe the architecture of computer networks and to formulate the conditions how a new partner can enter in a network. However words and sentences are ambiguous, have more than one meaning (see, e.g. footnote on p. 117). English people interpret sometimes an expression in a quite another way than others. This often leads to misunderstandings. This is espe cially annoying when constructing an international computer network. There is another difficulty: the system specification in a natural language is very far from the description needed for implementation. This gap should be reduced. The widespread use of computer networks requires more and more alternatives and new implementations, in view of which an unambiguous formal description preparing the data processing is most definitely necessary.
KeywordsInput Sequence Turing Machine Output Sequence Input Symbol Input Alphabet
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