In the context of software architecture, certain elements serve as building blocks to structure and organize software systems effectively.

A: An algorithm is a sequence of steps designed to perform a specific task and can be a critical part of system logic and functionality.

B: A component is a modular part of a system that encapsulates its contents and whose deployment and versioning can be managed independently.

D: A class in object-oriented programming encapsulates data for the object and operations that manipulate that data, serving as a blueprint within the architecture.

H: A package helps organize classes and interfaces that are related functionally, promoting a cleaner and more manageable architecture structure.