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Before we can do our calculation, we need to store the data we have entered into the computer or it will be lost, so we need some device that can remember the data, hence we have to have a memory device. We should be able to perform two major operations on this device:
Nowadays, Computers have many types of memory devices: Random-Access Memory (RAM)
ROM (Read-Only-Memory)
Cache
Registers
Fig. m010112.1 shows the relative performance/cost of the three types of memory.
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