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1. Large, powerful, and expensive computers used primarily by large organizations for critical applications
2. The process of creating a virtual version of computing resources to improve efficiency and flexibility
3. Older mainframe systems that are still in use due to their critical functions and high reliability
4. The simultaneous execution of multiple tasks to increase performance and efficiency
5. A method of processing data in large batches without user interaction
6. The ability of a mainframe system to remain operational without interruption for long periods
7. A centralized facility used to house mainframe computers and other networking equipment
8. A method of connecting multiple mainframes to work together as a single system