Universally unique identifier

There is a qualitative universality in the quantum behavior of class-3 rules, whose threshold plots typically consist of strong local oscillation patterns. Although clearly a maJiifestation of the fundamental additivity of probability amplitudes, the majority of patterns also possess distinctive local regularities by which evolutions defined by particular rules can be uniquely identified characteristic features of the... 

The Chemical Abstract Service (CAS) Registry Number is the universally recognized unique identifier of chemical substances. The CAS Registry Number for tylosin is 1401-69-0. 

Technetium is the 76th most abundant element, but it is so rare that it is not found as a stable element on Earth. All of it is artificially produced. Even though natural technetium is so scarce that it is considered not to exist on Earth, it has been identified in the tight spectrum from stars. Using a spectroscope that produces unique tines for each element, scientists are able to view several types of stars. The resulting spectrographs indicate that technetium exists in the stars and thus the universe, but not on Earth as a stable element. 

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