• 0 (number)
  0 (number)
  0 is both a numberand the numerical digit used to represent that number in numerals.It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems...
  
  , the integer between −1 and +1
• 0 (year), a year used in some calendar systems
• Slashed zero
  Slashed zero
  The slashed zero is a representation of the number '0' , with a slash through it. In character encoding terms, it is an alternate glyph for the self-same zero character...
  
  , a glyph used to distinguish the numeral 0 from the letter O
• 0 or #0, pseudonym of American musician Sid Wilson
  Sid Wilson
  Sidney George Wilson also known as Ratboy or DJ Sid, #0 , is an American disc jockey known as the turntablist of the Grammy Award winning band Slipknot. He is the youngest member of the band.-Biography:...
  
  , when performing with the band Slipknot

See also

• Zero (disambiguation)
  Zero (disambiguation)
  Zero is the name for both the digit 0 and the number 0.Zero may also refer to:-Mathematics:*Zero , in mathematics, a root of a holomorphic function...
  
  
• O
  O
  O is the fifteenth letter and a vowel in the basic modern Latin alphabet.The letter was derived from the Semitic `Ayin , which represented a consonant, probably , the sound represented by the Arabic letter ع called `Ayn. This Semitic letter in its original form seems to have been inspired by a...
  
  , a letter of the Latin alphabet
• Ø
  Ø
  Ø — minuscule: "ø", is a vowel and a letter used in the Danish, Faroese, Norwegian and Southern Sami languages.It's mostly used as a representation of mid front rounded vowels, such as ø œ, except for Southern Sami where it's used as an [oe] diphtong.The name of this letter is the same as the sound...
  
  , a letter of several Scandinavian alphabets
• ∅
  Empty set
  In mathematics, and more specifically set theory, the empty set is the unique set having no elements; its size or cardinality is zero. Some axiomatic set theories assure that the empty set exists by including an axiom of empty set; in other theories, its existence can be deduced...
  
  , the empty set
• 0#
  Zero sharp
  In the mathematical discipline of set theory, 0# is the set of true formulas about indiscernibles in the Gödel constructible universe. It is often encoded as a subset of the integers , or as a subset of the hereditarily finite sets, or as a real number...
  
  , the zero sharp set
• Φ
  Phi
  Phi may refer to:In language:*Phi, the Greek letter Φ,φ, the symbol for voiceless bilabial fricativeIn mathematics:*The Golden ratio*Euler's totient function*A statistical measure of association reported with the chi-squared test...
  
  , the Greek letter phi
• Θ
  Theta
  Theta is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth...
  
  , the Greek letter theta
• ⌀, the diameter symbol