<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 whereaSSemiconductor 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 iSStill on, unleSS it iSrefreShed. 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. (2000-05-22)