Null means 'nothing' or without value or consequence. The term may refer to:

Contents 1 In computing 2 In art 3 In science 4 Other 5 See also

In computing

• Null character, an ASCII value of 00 commonly used as a terminator, separator or filler
• Null device, a special computer file that discards all data written to it
• Null modem, a specially wired serial communications cable
• Null object pattern, a software design pattern using an object with defined neutral behavior
• Null pointer (sometimes written NULL), used in computer programming for an uninitialized, undefined, empty, or meaningless value
• Null (SQL), a special marker and keyword in SQL
• Null string, a character string of length zero

In art

• KK Null, a Japanese musician
• Null, an identity of the character Gray Fox in the Metal Gear Solid: Portable Ops video game
• Null, man-eating sentients in the Downs-Lord Triptich books by John Whitbourn
• Null, the Living Darkness, a Marvel Comics character
• Nulls, worm-like remains of defeated characters in the animated program ReBoot

In science

• Null allele (genetics)
• Null cipher, a ciphertext symbol
• Null hypothesis, a hypothesis in statistics
• Null (mathematics), a zero value in several branches of mathematics
• Null morpheme, a concept in linguistics
• Null (radio), a concept in electromagnetism
• Null result, the absence of the expected result in a scientific experiment
• Null vectors or curves in the causal structure of a Lorentzian manifold such as a Minkowski space-time

Other

• Null and void, having no legal validity
• Keith Null, an American football player
• The Null Corporation, the current imprint for Nine Inch Nails.

See also

• Nil
• Nul