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Volatile main memory. Loses instructions and data when power off. Non-volatile secondary memory. Magnetic disk; Flash memory; Optical disk (CDROM, DVD).
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Sep 2, 2018 ... ... secondary one, however, it is volatile; Your program and data are copied from secondary memory to main memory for efficiency reasons.
Non-volatile semiconductor memory is also used for secondary storage in various advanced electronic devices and specialized computers. Magnetic storage.
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