• Duplicate (1998 film), a Bollywood film directed by Mahesh Bhatt
• Duplicate (2009 film)
  Duplicate (2009 film)
  Duplicate is a 2009 Malayalam film directed by Shibu Prabhakar with Suraj Venjaramood in the lead role. This is Suraj's first movie as a hero and he handles a double role in the movie.- Plot :...
  
  , a 2009 Malayalam film
• Duplicates (film), a 1992 television film starring Gregory Harrison
  Gregory Harrison
  Gregory Neale Harrison is an American actor. He is probably best known for his role as Chandler in the 1987 cult favorite North Shore and as Trapper John MacIntyre's young surgeon, Dr. George Alonzo 'Gonzo' Gates, on the CBS series Trapper John, M.D....
  
   and Kim Greist
  Kim Greist
  Kimberley Bret "Kim" Greist is an American actress.-Early acting career:Greist was born in Stamford, Connecticut, the daughter of Norma M. and E. Harold Greist...
  
  
• The Duplicate
  The Duplicate
  The Duplicate, published in 1988, is a science fiction novel for young adults written by William Sleator.- Plot summary :The main character, David, finds a device at the beach that can duplicate any living organism...
  
  , a children's book by William Sleater
• Duplicate Boy
  Duplicate Boy
  Duplicate Boy is a fictional superhero in the first appearing in a story by science fiction writer Edmond Hamilton in Adventure Comics #324...
  
  , a DC comics superhero
• Batman Duplicate, a villain in Batman: The Animated Series
• The Duplicate Man, an episode of The Outer Limits
• The duplicator machine in Calvin and Hobbes

• Gene duplication
  Gene duplication
  Gene duplication is any duplication of a region of DNA that contains a gene; it may occur as an error in homologous recombination, a retrotransposition event, or duplication of an entire chromosome.The second copy of the gene is often free from selective pressure — that is, mutations of it have no...
  
  , a process which can result in free mutation
• Chromosomal duplication, which can cause Bloom and Rett syndrome
• Polyploidy
  Polyploidy
  Polyploid is a term used to describe cells and organisms containing more than two paired sets of chromosomes. Most eukaryotic species are diploid, meaning they have two sets of chromosomes — one set inherited from each parent. However polyploidy is found in some organisms and is especially common...
  
  , a phenomenon also known as ancient genome duplication
• Enteric duplication cysts
  Enteric duplication cysts
  Enteric duplication cysts, sometimes simply called duplication cysts, are rare cysts of the gastrointestinal tract. They most frequently occur in the small intestine, particularly the ileum, but can occur anywhere along the gastrointestinal tract....
  
  , certain portions of the gastrointenstinal tract
• Diprosopus
  Diprosopus
  Diprosopus , also known as craniofacial duplication , is an extremely rare congenital disorder whereby part or all of the face is duplicated on the head.- Development :Although classically considered conjoined twinning Diprosopus (Greek , "two-faced", from , , "two" and , [neuter], "face",...
  
  , a form of cojoined twins also known as craniofacial duplication
• Diphallia
  Diphallia
  Diphallia, penile duplication , diphallic terata, or diphallasparatus, is a medical condition in which a male infant is born with two penises. This is an extremely rare disorder with only approximately 100 cases of diphallia recorded since the first, reported by Johannes Jacob Wecker in 1609...
  
  , a medical condition also known as penile duplication

• Duplicate code
  Duplicate code
  Duplicate code is a computer programming term for a sequence of source code that occurs more than once, either within a program or across different programs owned or maintained by the same entity. Duplicate code is generally considered undesirable for a number of reasons...
  
  , a source code sequence that occurs more than once in a program
• Duplicate characters in Unicode
  Duplicate characters in Unicode
  Unicode has a certain amount of duplication of characters. These are pairs of single Unicode code points that are canonically equivalent. The reason for this are compatibility issues with legacy systems....
  
  

• Duplication matrix
  Duplication matrix
  In mathematics, especially in linear algebra and matrix theory, the duplication matrix and the elimination matrix are linear transformations used for transforming half-vectorizations of matrices into vectorizations or vice-versa....
  
  , a linear transformation dealing with half-vectorization
• Doubling the cube
  Doubling the cube
  Doubling the cube is one of the three most famous geometric problems unsolvable by compass and straightedge construction...
  
  , a problem in geometry also known as duplication of the cube
• A type of multiplication theorem
  Multiplication theorem
  In mathematics, the multiplication theorem is a certain type of identity obeyed by many special functions related to the gamma function. For the explicit case of the gamma function, the identity is a product of values; thus the name...
  
   called the Legendre duplication formula or simply "duplication formula"

• Duplicating machines
  Duplicating machines
  Duplicating machines were the predecessors of modern document-reproduction technology. They have now been replaced by digital duplicators, scanners, laser printers and photocopiers, but for many years they were the primary means of reproducing documents for limited-run distribution.Like the...
  
  , machines and processes designed to reproduce printed material, photocopying being among the best-known today; see also List of duplicating processes
• Loop bin duplicator
  Loop bin duplicator
  A loop bin duplicator is a specialized audio tape machine used in the duplication of pre-recorded audio cassettes.- Analog Loop Bin Duplicator :...
  
  , a device designed to copy pre-recorded audio tapes
• Double track
  Double track
  A double track railway usually involves running one track in each direction, compared to a single track railway where trains in both directions share the same track.- Overview :...
  
  , a method of railway design also known as track duplication
• In road construction, conversion of a single carriageway into Dual carriageway

• Duplicate publication, the publication same intellectual material by the same author twice
• Reduplication
  Reduplication
  Reduplication in linguistics is a morphological process in which the root or stem of a word is repeated exactly or with a slight change....
  
  , a morphological process in linguistics
• Rebirthing (Breathwork) duplicate, a therapeutic technique in alternative medicine
• Duplicate bridge
  Duplicate bridge
  Duplicate bridge is the most widely used variation of contract bridge in club and tournament play. It is called duplicate because the same bridge deal is played at each table and scoring is based on relative performance...
  
  , a popular variant of contract bridge
• Duplicate Scrabble
  Duplicate Scrabble
  Duplicate Scrabble is a variant of the board game Scrabble where all the players are faced with the same board and letters at the same time and must play the highest scoring word they can find. Although duplicate is rarely played at competition level in English, it is the most popular form of the...
  
  , a Scrabble variant popular in French and some other languages.
• "Decouple, duplicate, discriminate," the "three Ds" articulated by Madeleine Albright
  Madeleine Albright
  Madeleine Korbelová Albright is the first woman to become a United States Secretary of State. She was appointed by U.S. President Bill Clinton on December 5, 1996, and was unanimously confirmed by a U.S. Senate vote of 99–0...
  
   as necessary for NATO to avoid

See also

• Clone
  Cloning
  Cloning in biology is the process of producing similar populations of genetically identical individuals that occurs in nature when organisms such as bacteria, insects or plants reproduce asexually. Cloning in biotechnology refers to processes used to create copies of DNA fragments , cells , or...
  
  
• Copy (disambiguation)
• Doppelgänger
  Doppelgänger
  In fiction and folklore, a doppelgänger is a paranormal double of a living person, typically representing evil or misfortune...
  
  
• Redundancy (disambiguation)
• Reduplication
  Reduplication
  Reduplication in linguistics is a morphological process in which the root or stem of a word is repeated exactly or with a slight change....
  
  
• Symmetry
  Symmetry
  Symmetry generally conveys two primary meanings. The first is an imprecise sense of harmonious or aesthetically pleasing proportionality and balance; such that it reflects beauty or perfection...