Science Fair Project Encyclopedia
Null is usually that which has no value (nothingness). It originates from the Latin word nullus, meaning not any.
In computer programming, null is a special value for a pointer (or other kind of reference) used to signify that the pointer's target is intentionally not a valid data element. Often, 0 (zero) is used as the null value, as most operating systems consider it an error to try to access such a low memory address. ("Null" also happens to be the German and Norwegian word for zero.)
However, null is used in many other computing disciplines (often interchangeably with nul or nil):
Note that this is not the same as the definition of nothing because it is more related to computer science.
An mathematical mappping is said to be null potent if repeated application can map the whole domain into the null element.
In cryptography, especially classical cryptography, a null is a ciphertext symbol which has no actual meaning, but is intended to confuse the cryptanalyst. Typically, a null will be a character which decrypts to obvious nonsense at the end of an otherwise intelligible phrase. In a null cipher, most of the characters may be nulls.
This can be an advantage, as nulls in the horizontal plane can be used to protect other transmitters from interference. If not carefully planned however, nulls can affect the receivability of a signal in any given place. Null fill in the vertical plane is used to prevent this.
Null (website) is a manga scanlation group. They were one of the first groups to continue to translate and release a manga series after it was licensed. One of the manga they translate is the popular One Piece by Eiichiro Oda. The group was founded towards the end of 2002.
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