Final answer:
A developer with a Visual Studio Professional subscription can install the software on multiple computers, including a home computer, as long as they are the sole user for development purposes.
Step-by-step explanation:
The question relates to how a developer with a Visual Studio Professional subscription should license a second computer used for development outside of work. According to the licensing terms for Visual Studio subscriptions, a subscriber is entitled to install the software on as many machines as needed, as long as the licensee is the only one using the software for development purposes. Therefore, the developer can use the subscriber software on a home computer without requiring an additional license, provided that the home computer is not shared with others for development work.