MRAM stands for Magnetic Random Access Memory, which could enable the development of computing devices that are always on, don't require time to "boot up" and don't require a traditional hard drive. MRAM chips utilize semiconductor materials (such as silicon) for memory and central processing units, keeping the permanent information storage onmagnetized hard drives which utilize the spin of the electron.
MRAM is still in development, although some working versions have been installed in systems built for demonstration. It relies on the science of spintronics which exploits the quantum mechanical property of electron spin.
- Memory chip threat to hard discs from BBC Technology News