Module: A self-contained unit of code that can be independently developed and tested. Modules are often used to organize code within a larger application. Dependency: A piece of software that another piece of software relies on to function. Dependencies are often managed through package managers. Library: A collection of pre-written code that developers can use to optimize tasks. Libraries provide reusable functions and routines. Package: A bundle of code that includes modules, libraries, and other resources. Packages are distributed through package managers like npm or PyPI. Component: A reusable piece of a user interface in frameworks like React or Angular. Components encapsulate both logic and presentation.