<storage> (NVS, persistent storage, memory) A term describing a storage device whose contents are preserved when its power is off. Storage using magnetic media (e.g. magnetic disks, magnetic tape or bubble memory) is normally non-volatile by nature whereas semiconductor memories (static RAM and especially dynamic RAM) are normally volatile but can be made into non-volatile storage by having a (rechargable) battery permanently connected.
Dynamic RAM is particularly volatile since it looses its data, even if the power is still on, unless it is refreshed. An acoustic delay line is a (very old) example of a volatile storage device.
Other examples of non-volatile storage are EEPROM, CD-ROM, paper tape and punched cards.
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Nearby terms: non-volatile « non-volatile memory « Non-Volatile Random Access Memory « non-volatile storage » noob » no-op » NOR