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Sets of interconnected components that transform, store, transport, or control materials, energy, and/or information for particular purposes. In any system, how the parts work together is as important as their individual characteristics. Important technological systems concepts include: – input, output, transformation, and control – “[black box](https://technology.tki.org.nz/Glossary#glossary_33062 “Link to the ‘black box’ glossary term. “)” – redundancy and [reliability](https://technology.tki.org.nz/Glossary#glossary_33007 “Link to the ‘reliability’ glossary term. “) – operational parameters.