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❪𖣐₃ₕ❫ Plugins ○｜Definition｜1st｜20260723233041-00-⌔

Plug-in (computing) - Wikipedia

Plug-in (computing)

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In computing, a plug-in (also spelled plugin), add-in (also addin, add-on, or addon) or extension is a software component that extends the functionality of an existing software system without requiring the system to be re-built. A plug-in feature is one way that a system can be customizable.¹

Applications support plug-ins for a variety of reasons including:

• Enable third-party developers to extend an application
• Support easily adding new features
• Reduce the size of an application by not loading unused features
• Separate source code from an application because of incompatible software licenses

Printed 2026-07-23.

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Footnotes

1. Sterne, Jonathan. “Plug-in | software”. Encyclopedia Britannica. Retrieved 2021-02-05. ↩

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