Non Volatile Memory
|Term||Non Volatile Memory|
the name given to the ‘flash’ RAM found in many items of solid state avionic equipment fitted to modern aircraft. ‘Non Volatile’ means that, subject to memory capacity, stored data is retained when electrical power is removed.
SKYBRARY, reference tool for aviation safety knowledge 
NVM is most often included in a design to aid fault identification and rectification by the provision of a history of recorded fault signals. Many familiar items of avionic equipment are nowadays of solid state design and incorporate NVM.