What is a 'module' in programming?

A 'module' in programming refers to a self-contained piece of code that can be reused across different parts of a program. This enables developers to write code in a more organized and maintainable way. By encapsulating related functions, classes, or variables within a module, programmers can break down complex software into manageable sections. This not only promotes code reuse but also enhances collaboration, as different developers can work on separate modules without causing conflicts.

Modules help in structuring code, which makes it easier to test and debug. Moreover, when using external libraries or frameworks, these are often composed of modules that provide specific functionality, further illustrating the concept of reuse and compartmentalization in programming.

In contrast, other options describe different concepts – one focuses on data organization, another on coding standards, and yet another on communication interfaces, but none capture the essence of a module like the selected answer does. This foundational understanding of modules is essential for effective programming and software development practices.