Non-volatile memory

As a non-volatile data memory ( short non-volatile memory from the English nonvolatile or non-volatile memory, short NVM), read only memory or persistent store various data memory in digital data processing referred whose stored information is retained on a permanent basis - even during the computer is not operating or is not supplied with power.

Non-volatile memory are nowadays almost exclusively secondary storage such as hard drives, CDs, DVDs, or diskettes, and semiconductor memory devices such as EPROM and flash memory. In the early days of information technology drum memory and core memory were employed as non-volatile memory. In recent years, the growing interest in non-volatile memory ( engl. non-volatile random access memory NVRAM). Examples of this class of RAMs are FeRAM, MRAM and PCRAM.