g Machine represents a theoretical model since computers with truly "infinite" memory capacity cannot be constructed.
Since Turing was a theoretical mathematician, his interest was in determining the universe of problems that were capable of solution by this model. He was also interested several biological problems as well as a number of mathematically-oriented problems associated with the human nervous system.
More recently, in molecular biology, the Turing Machine has gained the distinction of being an analog of the behavior of nucleic acid polymerases such as DNA and RNA (enzymes that scientists know will catalyze the formation of nucleic acid polymers. Of additional interest to neural systems researchers has been an obscure paper written by Turing on that was associated with the learning behavior of artificial neural networks that, for some reason, was not published until 14 years after his death in 1954.
By today's standards, the Turing Machine can be considered more of a software application than a piece of hardware. It is
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