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Computer system is sized for the total user workload based on (1) number of users sharing the (2) type of work pardoned (interactive processing, batch processing. CAD, system simultaneously, engineering, scientific), and (3) amount of storage. Following are the components of a computer system and their significance.
Platform: The hardware platform and operating system determine which programs can run on the computer. Every application is written to run under a specific CPU and operating system environment. The most widely used platform means more software is available for it. See platform.
Input/output: A server's input/output (1/0) capacity determines the number of simultaneous users that it can support at terminals or PCs. See channel.
Number of CPUs and Cores: The more CPUs, the more processing that can take place: at the same time. High-end servers often contain multiple processors. The CPU chip itself may include more than one processor. See SMT and dual core.