Which characteristic defines a personal computer (PC)?

The characteristic that defines a personal computer (PC) is that it performs all activities by itself. A personal computer is designed to be operated by an individual, allowing users to run various applications, manage files, and perform tasks independently without needing to share the device or rely on external resources. PCs typically come with all necessary hardware and software components to execute a wide range of functions, from word processing to web browsing.

In contrast, personal computers are not primarily designed for business use, do not require multiple users for operation, and while they can absolutely be used for gaming, their functionality extends far beyond just that purpose. Their versatility is what makes personal computers a common choice for individual users in various environments, whether at home or in the workplace.