Final answer:
Mainframes are used as super servers mainly in large organizations that require high-capacity data processing, centralized management, and reliability to handle critical applications in sectors like banking, insurance, and retail.
Step-by-step explanation:
Mainframes are powerful computers used primarily by large organizations for critical applications, bulk data processing, and enterprise resource management. Mainframes excel in handling very large amounts of data and have high processing power, making them ideal as superservers for critical applications. They often serve as a central computer within an enterprise, providing centralized management of data, applications, and systems. Moreover, with their robust security features and ability to process numerous transactions in real-time, mainframes are commonly employed in industries such as banking, insurance, and retail where data integrity and uptime are paramount.
In essence, mainframes are used as super servers because they can handle vast amounts of transactions and users concurrently, making them the backbone for large-scale computing environments.