The primaty RAM (random-access memory) installed in the computer.The operating system copies applications from disk in to memory ,where all program execution and data processing takes place,and then writes the results back to disk.The amount of memory installed in the computer can determine the size and number of programs that it can run,as well as the size of the largest data file.
Mother board:The main printed circuit board in a computer containing the central processing unit(CPU),appropriate coprocessor and support chips device controllers and memory .It also includes expanstion slots to give access to the computer's internal bus.
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