Editing Non-volatile memory (section)

=== Flash memory ===
{{Main|Flash memory}}

[[Flash memory]] is a solid-state chip that maintains stored data without any external power source. It is a close relative to the EEPROM; it differs in that erase operations must be done on a block basis, and its capacity is substantially larger than that of an EEPROM. Flash memory devices use two different technologies—NOR and NAND—to map data. NOR flash provides high-speed random access, reading and writing data in specific memory locations; it can retrieve as little as a single byte. NAND flash reads and writes sequentially at high speed, handling data in blocks. However, it is slower on reading when compared to NOR. NAND flash reads faster than it writes, quickly transferring whole pages of data. Less expensive than NOR flash at high densities, NAND technology offers higher capacity for the same-size silicon.<ref name="Flash1">{{cite magazine |author=Russell Kay |magazine=ComputerWorld |url=http://www.computerworld.com/s/article/349425/Flash_Memory |title=Flash memory |archive-url=https://web.archive.org/web/20100610065251/http://www.computerworld.com/s/article/349425/Flash_Memory |archive-date=10 June 2010 |date=7 June 2010}}</ref>