What is NOT a component of an information system?

The correct choice identifies what is not traditionally considered a component of an information system. An information system typically consists of several key elements that work together to collect, store, process, and disseminate information. These components include data, people, hardware, software, and networks.

Data forms the foundational content that the system processes, while people—users or IT professionals—interact with the system, applying their expertise and making decisions based on the system's output. Hardware includes the physical devices and equipment used to create, store, and manipulate data, such as computers and servers.

In contrast, a marketing strategy, while essential for guiding business decisions and marketing efforts, does not fall under the classification of an information system component. It is a broader business concept that outlines how a company intends to reach and engage its customers but does not pertain directly to the structure or function of an information system itself. Therefore, identifying a marketing strategy as not being a component is indeed accurate in the context of defining an information system.