There are many types of memory, which can be divided into main memory and auxiliary memory according to their uses. Main memory is also called internal memory (referred to as memory), and auxiliary memory is also called external memory (referred to as external memory). live).
The most prominent feature of main memory is fast access speed, but small capacity and expensive price; the characteristics of external memory are large capacity, low price, but slow access speed.
Main memory is used to store programs and data that are needed immediately; external memory is used to store programs and data that are not used temporarily. Information is frequently exchanged between internal memory and external memory.
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