An internal storage consisting of arrays of small rings of magnetic material called ferrite is

An internal storage consisting of arrays of small rings of magnetic material called ferrite is Magnetic core. Magnetic-core memory, also called core memory or magnetic-core storage, any of a class of computer memory devices consisting of a large array of tiny toruses of a hard magnetic material that can be magnetized in either of two directions. The two directions can represent either of the values, 0 or 1, in a binary bit.