of non-volatile memory chips as a system's main memory, as persistent memory. A standard for persistent memory known as NVDIMM-P has been published in 2021.

Early NVRAMs

Some early computers used magnetic drum, which was non-volatile as a byproduct of its construction. The industry moved to magnetic-core memory in the later 1950s, which stored data in the polarity of small magnets. Since the magnets held

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