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Redundancy or redundant may refer to:
Language and arts
- Redundancy (linguistics), information that is expressed more than once
- Redundant (play), 2001 drama by Leo Butler
- "Redundant" (song), 1997 song by the American rock band Green Day
Computer science and engineering
- Redundancy (databases), database systems which have a field that is repeated in two or more tables
- Redundancy (engineering), the duplication of critical components or functions of a system with the intention of increasing reliability
- Redundancy (information theory), the number of bits used to transmit a message minus the number of bits of actual information in the message
- Redundancy (total quality management), quality which exceeds the required quality level, creating unnecessarily high costs
- Redundancy (user interfaces), the same task executed by several different methods
- Redundant code, computer program code that has no effect on program output
- Redundancy check, error detection made possible by adding redundant information to a message or signal
- Logic redundancy, a digital gate network containing circuitry that does not affect the static logic function
- Codon redundancy, the redundancy of the genetic code exhibited as the multiplicity of three-codon combinations
- Cytokine redundancy, a term in immunology referring to the phenomenon in which, and the ability of, multiple cytokines to exert similar actions
- Gene redundancy, the existence of several genes in the genome of an organism that perform the same role to some extent
- Redundancy (employment), termination of employment of a person whose post becomes unnecessary
- Duplication (disambiguation)
- All pages with titles containing "Redundancy"
- All pages beginning with "Redundant"
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