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{{primary sources|date=December 2013}}
[[File:Flash-EEPROM.jpg|thumb|150px|Flash-[[EEPROM]] in a Router - real MTD]]
'''Memory technology devices''' (MTD) are a type of [[device file system#Devices|device file]] in [[Linux]] for interacting with [[flash memory]]. The MTD subsystem was created to provide an [[abstraction layer]] between the hardware-specific device drivers and higher-level applications. Although character and block device files already existed, their semantics don't map well to the way that flash memory devices operate.
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