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'''Dual''' or '''Duals''' may refer to:
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==Paired/two things==
* [[Dual (mathematics)]], a notion of paired concepts that mirror one another
** [[Dual (category theory)]], a formalization of mathematical duality
*** see more cases in [[:Category:Duality theories]]
* [[Dual number]], a number system used in [[automatic differentiation]]
* [[Dual (grammatical number)]], a grammatical category used in some languages
* [[Dual county]], a Gaelic games county which competes in both Gaelic football and hurling
* [[Dual diagnosis]], 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]]
* [[Dual impedance]], electrical circuits that are the dual of each other
* [[Dual SIM]] cellphone supporting use of two SIMs
* [[Aerochute International Dual]] a two-seat Australian powered parachute design

==Acronyms and other uses==
* [[Dual (brand)]], a manufacturer of Hifi equipment
* [[DUAL (cognitive architecture)]], an artificial intelligence design model
* [[DUAL algorithm]], or diffusing update algorithm, used to update Internet protocol routing tables
* Dual language, alternative spelling of the Australian Aboriginal [[Dhuwal language]]
* [[DUAL table]], a special one-row and one-column database table
* [[Dual-Ghia]], US-brand of luxury-car of the late 1950s

== Media ==
* [[Dual (2008 film)|''Dual'' (2008 film)]], a 2008 western drama film
* [[Dual (2022 film)|''Dual'' (2022 film)]], a 2022 science fiction thriller film
* [[Dual (Heroes)|"Dual" (''Heroes'')]], an episode of ''Heroes''
* [[Dual! Parallel Trouble Adventure]], an anime series
* [[Dual (album)|''Dual'' (album)]], an album of traditional Scottish and Irish music recorded by Éamonn Doorley, Muireann Nic Amhlaoibh, Julie Fowlis and Ross Martin, released 2008
* [[Dual (EP)|''Dual'' (EP)]], a 2013 EP by Sampha
* ''[[Duals]]'', an album by U2
* [[The Duals]], American duo
* [[Dual (brand)]], brand name of audio and video electronics.

==See also==
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*[[Duality (disambiguation)]]
*[[Duel (disambiguation)]], a homonym
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*{{lookfrom}}
*[[Double (disambiguation)]]
*[[Duo (disambiguation)]]
*[[Pair (disambiguation)]]
*[[Twin (disambiguation)]]

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