• Dual (mathematics), a notion of paired concepts that mirror one another
  • Dual (category theory)
    Dual (category theory)
    In category theory, a branch of mathematics, duality is a correspondence between properties of a category C and so-called dual properties of the opposite category Cop...
    
    , a formalization of mathematical duality
  • . . . see more cases in :Category:Duality theories
• Dual (grammatical number)
  Dual (grammatical number)
  Dual is a grammatical number that some languages use in addition to singular and plural. When a noun or pronoun appears in dual form, it is interpreted as referring to precisely two of the entities identified by the noun or pronoun...
  
  , a grammatical category used in some languages
• Duality (electrical circuits)
• Dual diagnosis
  Dual diagnosis
  The term dual diagnosis is used to describe the comorbid condition of a person considered to be suffering from a mental illness and a substance abuse problem. There is considerable debate surrounding the appropriateness of the term being used to describe a heterogeneous group of individuals with...
  
  , a psychiatric diagnosis of co-occurrence of substance abuse and a mental problem
• Dual fertilization, simultaneous application of a P-type and N-type fertilizer
  Fertilizer
  Fertilizer is any organic or inorganic material of natural or synthetic origin that is added to a soil to supply one or more plant nutrients essential to the growth of plants. A recent assessment found that about 40 to 60% of crop yields are attributable to commercial fertilizer use...
  
  
• DUAL (cognitive architecture)
  DUAL (cognitive architecture)
  DUAL is a general cognitive architecture integrating the connectionist and symbolic approaches at the micro level. DUAL is based on decentralized representation and emergent computation. It was inspired by the Society of Mind idea proposed by Marvin Minsky but departs from the initial proposal in...
  
  , an artificial intelligence design model
• DUAL algorithm, or Diffusing update algorithm, used to update Internet protocol routing tables
• DUAL table
  DUAL table
  The DUAL table is a special one-row table present by default in all Oracle database installations. It is suitable for use in selecting a pseudocolumn such as SYSDATE or USER.The table has a single VARCHAR2 column called DUMMY that has a value of 'X'....
  
  , a special one-row and one-column database table
• Dual SIM
  Dual SIM
  A dual SIM mobile phone is one which holds two SIM cards. Initially, dual-SIM adapters were made available to use in regular mobile phones to allow them to contain two SIMs, and to switch from one to the other as required. This combination is called a standby dual-SIM phone. The first Dual SIM...
  
   cellphone
• Dual (brand)
  Dual (brand)
  Dual is a brand name of audio and video electronics.-History:In 1927, Gebrüder Steidinger, a German gramophone power supply manufacturer, adopted the name Dual in reference to the dual-mode power supplies it pioneered. The power supplies allowed gramophones to be powered from mains electricity or...
  
  , a manufacturer of Hifi equipment
• Dual county
  Dual County
  Dual county is a term used in Gaelic games to describe a GAA county that competes at a similar level in both hurling and gaelic football. For example, Cork and Dublin play in Division 1 in both the NHL and NFL.Generally recognised dual counties include:...
  
  , referring to a Gaelic Athletic Association county which traditionally competes at a similar level in both Gaelic football and hurling

Media

• Dual (album)
  Dual (album)
  Dual is an album by four acclaimed Irish and Scottish musicians: Éamonn Doorley, Muireann Nic Amhlaoibh , Julie Fowlis and Ross Martin....
  
  , an album of traditional Scottish and Irish music recorded by Éamonn Doorley, Muireann Nic Amhlaoibh, Julie Fowlis and Ross Martin, released 2008
• Dual (film)
  Dual (film)
  Dual is a 2005 independent western drama film directed by Steven R. Monroe and written by and starring Michael Worth.-Plot:Luke Twain is a drifter who finds a small settlement where everyone has been killed...
  
  
• "Dual" (Heroes)
  Dual (Heroes)
  "Dual" is the thirteenth episode of the third season of the NBC science fiction drama series Heroes and forty-seventh episode overall. The episode aired on December 15, 2008, as the conclusion to the "Volume 3: Villains" storyline...
  
  , an episode of Heroes
• Dual! Parallel Trouble Adventure
  Dual! Parallel Trouble Adventure
  is a fourteen episode series created in 1999 by Masaki Kajishima and produced by AIC, both well-known for the Tenchi Muyo! franchise. It is licensed in the US by Pioneer LDC, later known as Geneon...
  
  , an anime series

See also

• All page titles starting from Dual
• Duality (disambiguation)
• Duel (disambiguation)
  Duel (disambiguation)
  -Combat:*a duel, the pre-arranged, private fight between two persons to settle a point of honour or personal quarrel.*the wager of battle*single combat in general*a fight between two animals, see tournament species*any contest between two persons or parties...
  
  , a homonym
• Double (disambiguation)