Virtual memory is a memory management technique that allows a computer to use more RAM than it has installed. It does this by temporarily storing parts of a program in the hard drive, which is much slower than RAM, but also much larger. For example, a program may need to use more RAM than is available, so the computer can store some of the program in the hard drive and swap it in and out as needed. This allows the program to run as if it had more RAM available, even though it doesn’t.

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