The Architecture of a software system defines that system in terms of components and interactions/connections
among those components.

Aspects concerned:

1. Design-time        functional interfaces and component dependencies.
2. Compose-time    assemble a system from components
3. Runtime             frameworks and models that provide runtime services for component-based systems.

Architectures support the reuse of design and code components by standardizing interfaces, protocols, and packaging of functionality at a high leve of abstraction,  and also themselves by reusable assets.