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Electrically Erasable Programmable ROM

EEPROMs can be programmed and erased without using any special extra hardware. Instead a simple electrical current can be used. Unlike other programmable ROM chips EEPROMs need not be completely programmed at one time. Instead blocks of data can be programmed individually.

As well as being used in modern computers for updateable BIOSes, EEPROMs are typically used for USB drives, as well as for compact flash memory, MultiMedia cards, SD cards, etc.

EEPROM is cheap and is used for reprogrammable ROM applications like Flash.

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