A "stub" is a term used in various fields, primarily in software development and documentation. In programming, a stub is a piece of code that simulates the behavior of a component that is not yet implemented. This allows developers to test and integrate parts of a system without needing the complete functionality. Stubs help in isolating specific features during the development process. In documentation, a stub refers to a brief or incomplete entry that serves as a placeholder for more detailed information to be added later. For example, a Wikipedia article may have a stub indicating that the topic needs further expansion. Stubs are useful for organizing content and encouraging contributions from others.