eklog

Although a computer's storage hardware always contains numbers, "nothing" symbolises a number skipped by the system when the programmer desires. Many systems have similar capabilities but different keywords, such as "null", "NUL", "nil", and "None". To instruct a computer processor to do nothing, a keyword such as "NOP" may be available. This is a control abstraction; running processors are always computing something, if only the identity function.

Nothing is no thing, denoting the absence of something. Nothing is a pronoun associated with nothingness, is also an adjective, and an object as a concept in the Frege-Church ontology. In nontechnical uses, nothing denotes things lacking importance, interest, value, relevance, or significance. Nothingness is the state of being nothing, the state of nonexistence of anything, or the property of having nothing.

The number zero is sometimes used to denote nothing. The empty set contains no elements. Nothing to see here.

A region of space is called a vacuum if it does not contain any matter, though it can contain physical fields. In fact, it is practically impossible to construct a region of space that contains no matter or fields, since gravity cannot be blocked and all objects at a non-zero temperature radiate electromagnetically. However, even if such a region existed, it could still not be referred to as "nothing", since it has properties and a measurable existence as part of the quantum-mechanical vacuum. Where there is supposedly empty space there are constant quantum fluctuations with particles continually in and out of existence.

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