Real time - data is processed instantly, Batch - data is collected and processed in a single operation at a set time, Multi-user processing - A system that involves many users at different computers sharing the processor of a powerful computer, example of real time - air traffic control systems, example of batch - payroll system, advantage of real time - systems are always up to date, disdavantage of batch - system not ‘up-to-date’ until batch is processed,

Processing Modes

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