nonvolatile memory

computing

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Last updated

July 1, 2026

Quick Summary

Nonvolatile memory in computing refers to storage that retains data even when the power is turned off. This is in contrast to volatile memory, which loses its contents when power is interrupted.1

Types of nonvolatile memory include:
* Read-Only Memory (ROM): This memory is not rewritable once manufactured and is used for essential computer operations like booting up.2
* Erasable Programmable ROM (EPROM), Electrically Alterable ROM (EAROM), and Flash Memory: These are rewritable nonvolatile memories, though the writing process is slower than reading. They are used for special purposes where updates are infrequent, such as for a computer's BIOS.2

Auxiliary memory, which provides long-term storage, is also nonvolatile. Common examples include magnetic disks, magnetic tapes, and optical discs.2

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Nonvolatile semiconductor memories, unlike SRAM and DRAM, do not lose their contents when power is turned off. Some nonvolatile memories, such as read-only memory (ROM), are not rewritable once manufactured or written. Each memory cell of a ROM chip has either a transistor for a…
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Nonvolatile semiconductor memories, unlike SRAM and DRAM, do not lose their contents when power is turned off. Some nonvolatile memories, such as read-only memory (ROM), are not rewritable once manufactured or written. Each memory cell of a ROM chip has either a transistor for a…
Read More