non-volatile

from The Collaborative International Dictionary of English v.0.48

nonvolatile \nonvolatile\ adj.
   not readily evaporated. Opposite of {volatile}.
   [WordNet 1.5]

from The Free On-line Dictionary of Computing (8 July 2008)

non-volatile storage
non-volatile
non-volatile memory
persistent memory
volatile memory
volatile storage

   <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 {refresh}ed.
   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)