AAB

AAB is an acronym that can refer to several different things depending on context. The most widely used meaning in modern software development is the Android App Bundle (AAB), a packaging format introduced by Google for distributing Android apps. The Android App Bundle uses the .aab file extension and serves as a container for an app’s compiled code, resources, and metadata organized into modules. Developers upload an AAB to Google Play, which, together with Play App Signing, generates device-specific APKs for delivery. Dynamic delivery enables the Play Store to serve only the code and resources needed for a user’s device, reducing download sizes and allowing modular feature delivery. Although developers publish an AAB to the store, Google Play ultimately handles the APK set that is installed on devices.

Beyond Android packaging, AAB carries other meanings across different domains, and its exact expansion is context-dependent. It can be used as an acronym for various organizations, boards, or standards in fields such as government, business, or science. Because AAB is not unique to a single widely adopted term, its interpretation should be inferred from the relevant field or accompanying information. In practice, readers encountering AAB should look for domain-specific clarification to determine which meaning is intended.