An information storage device is a memory. Computer memory can be divided into two main groups – internal and external memory. The internal memory includes:

Random access memory (RAM);
cache memory;
Permanent storage device (ROM).

The external ones include:

hard drives;
floppy disks;
flash cards;
streamers;
Optical discs (CD or DVD).

The internal memory is usually volatile, and the external one is non-volatile, respectively, i.e. data can be stored in the internal memory only if there is power. Because of […]

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