Null

Null may refer to:

• Nuller, an optical tool using interferometry to block certain sources of light

• Null (SQL) (or NULL), a special marker and keyword in SQL indicating that something has no value
• Null character, the zero-valued ASCII character, also designated by , often used as a terminator, separator or filler. This symbol has no visual representation.
• Null device, a virtual file that discards data written to it, on Unix systems /dev/null
• Null pointer or reference (sometimes written NULL, nil, or None), an object pointer (or reference) not currently set to point (or refer) to a valid object

• Null (mathematics), a zero value in several branches of mathematics

• Null (physics), a point in a field where the field quantity is zero
• Null (radio), a concept in electromagnetism

• The Null Corporation, an imprint of the band Nine Inch Nails
• Null (Intronaut EP), 2006
• Null (Foetus EP), 1995
• Null, an identity of the character Gray Fox in the Metal Gear Solid: Portable Ops video game
• Null, a villain from Teenage Mutant Ninja Turtles Adventures

• Christopher Null (born 1971), American writer and film critic
• Eduard van der Nüll (1812–1868), Austrian architect
• Gary Null (born 1945), American radio host and author of works about alternative medicine
• Keith Null (born 1985), American football player
• Luke Null (born 1990), American actor and comedian

• Ø (disambiguation)
• Null symbol (disambiguation)
• 0 (disambiguation)
• Nil (disambiguation)
• Nul (disambiguation)