Non-volatile (NV) refers to computer memory which remains in a persistent state even when its power supply is interrupted. Non-volatile memory does not lose its contents when its power is switched off, unlike other types of memory such as RAM and ROM.


Non-volatile memory is often used in computers, gaming consoles, and embedded systems (systems such as industrial control systems, home appliance controllers, and digital cameras). It is also used in computer and mobile devices, such as digital cameras, personal digital assistants (PDAs), MP3 players, cellular phones, and pocket calculators.


There are several types of non-volatile memory, including flash memory, read-only memory (ROM), and battery-backed random-access memory (BBRAM). Flash memory, also known as NOR flash, is used in consumer electronic devices such as digital cameras and USB drives. ROM is a type of non-volatile memory that is used to store permanent data and system instructions. BBRAM is a type of RAM that uses a battery to back up its data in case the system loses power.


Non-volatile memory has several advantages over other types of memory. It is inexpensive and does not require regular backups or frequent refreshing. It is also resistant to shock and vibration, which makes it more reliable than other types of memory. Additionally, non-volatile memory does not require power to retain its contents, which makes it ideal for devices with frequent power outages. Finally, non-volatile memory is faster and more efficient than hard drives.


Non-volatile memory also has some disadvantages. It often has a slower write speed than other types of memory, and it has a limited lifespan as its cells can wear out over time. Additionally, non-volatile memory is typically more expensive than other memory types.


Non-volatile memory is an important type of memory used in various electronic devices. It is resistant to shock, vibration, and power outages, and has a slower write speed than other types of memory. Non-volatile memory is used in consumer electronics, computers, gaming consoles, and embedded systems. It is also relatively inexpensive, and has a limited lifespan.

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