What does API stand for in computing?

The term API stands for Application Programming Interface. It refers to a set of rules and tools that allows different software applications to communicate with each other. An API defines the methods and data formats that applications can use to request and exchange information, which enables developers to build applications that interact with external services, libraries, or platforms without needing to understand the underlying code.

APIs are essential for the modern software ecosystem, as they facilitate integration between different systems and enhance the functionality of applications by allowing them to leverage existing services. For instance, many web applications use APIs to interface with databases, authenticate users, or communicate with third-party services like payment processors or social media platforms.

The other options do not correctly define API in the context of computing. They might relate to other technical concepts but do not encapsulate the widely accepted definition and function of APIs in programming and software development.