As a domain expert in the field of computer science, I am well-versed in the nuances of various computing systems. The term "personal computer," often abbreviated as "PC," is a category of computer that is designed for individual use. PCs are characterized by their ease of use, affordability, and the ability to be easily upgraded and customized. They are typically used for a wide range of tasks, including but not limited to, word processing, web browsing, gaming, and multimedia applications.

In the market, PCs come in various forms such as desktop computers, which are stationary and often more powerful; netbooks, which are smaller and more portable but with limited processing power; tablet PCs, which offer touch screen capabilities and are highly portable; and notebook computers, which are essentially laptops that provide a balance between portability and performance.

On the other hand, a mainframe computer is a type of computer used primarily by large organizations, government entities, and corporations for critical applications. Mainframes are known for their immense processing power, large storage capacity, and ability to handle a high volume of transactions and data. They are designed to be highly reliable and secure, often serving as the backbone of large-scale operations. Mainframes are not typically associated with personal use, given their size, cost, and specialized nature.

The distinction between a mainframe and a personal computer lies in their intended use, scalability, and the environment in which they operate. PCs are personal, meant for individual tasks, and are widely accessible to consumers. Mainframes, however, are enterprise-level systems that serve many users simultaneously and are managed by teams of IT professionals.

While both PCs and mainframes are computing devices, they serve very different purposes and operate on different scales. PCs are the tools of the individual, whereas mainframes are the powerhouses of large organizations. The evolution of technology has led to a vast array of options within the PC market, catering to various needs and preferences, while mainframes continue to be refined for their specific, large-scale applications.

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Personal computer in short is term as PC. ... Some of the personal computers available in the market are desktop computer, Netbook, tablet PC and notebook computer. Mainframe computer are the computer which are used by the government organization and corporate agencies.read more >>