[¦nän′väl·ə·təl ¦ran·dəm ¦ak‚ses ′mem·rē] (computer science) A semiconductor storage device which has two memory cells for each bit, one of which is volatile, as in a static RAM (random-access memory), and provides unlimited read and write operations, while the other is nonvolatile, and provides the ability to retain information when power is removed. Abbreviated NV RAM.