The nervous system and the automatic machine are fundamentally alike in that they are devices, which make decisions on the basis of decisions they made in the past.

Phil. Leo had educated Norbert at home until 1903 employing teaching methods of his own invention except for a brief interlude when Norbert was 7 years of age. The Wiener–Khinchin theorem (or Wiener – Khintchine theorem or Khinchin – Kolmogorov theorem) states that the power spectral density of a wide-sense-stationary random process is the Fourier transform of the corresponding autocorrelation function.

A famous child prodigy Wiener later became an early researcher in stochastic and noise processes contributing work relevant to electronic engineering electronic communication and control systems. Norbert Wiener (November 26 1894 – March 18 1964) was an American mathematician. He was Professor of Mathematics at MIT.