What term refers to all activities involved in making a software system available for use?

The term that refers to all activities involved in making a software system available for use is deployment. Deployment encompasses a range of activities, including installation, configuration, testing, and the actual rollout of the software to the end-users. It ensures that the software is not only delivered—putting it into a production environment—but also made functional and accessible for its intended users.

Understanding deployment is crucial as it signifies the transition from development to operation, moving the software into its practical, real-world use. This involves verifying that the software operates as expected in its new environment and that users can access and utilize it.

In contrast, development refers specifically to the creation of the software, including coding and design. Implementation is often thought of as the process of putting a plan or system into effect, which can overlap with deployment but is more about the actual usage of the software once it is available. Maintenance deals with ongoing support, updates, and fixes required after deployment, ensuring the software continues to function correctly over time. Each of these aspects is essential in the software lifecycle, but deployment is uniquely focused on preparing the software for initial use.