Final answer:
A user purchasing software for personal use would buy a personal license, whereas a software developer typically works in the quaternary sector of the economy.
Step-by-step explanation:
If a user is buying software for individual use, the most appropriate type of license they would be purchasing is a personal license. This type of license is typically designed for private or non-commercial use, often limited to one computer or user. On the other hand, an enterprise license is meant for larger organizations with multiple users, a site license allows the software to be used throughout a specific site or location (like a university campus), and an open-source license pertains to software with source code that can be modified and shared under defined terms.
To address the provided reference information, a software developer would primarily work in the quaternary sector of an economy, which includes services such as information technology, research and development, and other knowledge-based services. This sector is characterized by the intellectual aspect of its activities.