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In computing, magnetic-core memory is a form of random-access memory. It predominated for roughly 20 years between 1955 and 1975, and is often just called core memory, or, informally, core. Core memory uses toroids (rings) of a hard magnetic material (usually a semi-hard ferrite). Each core stores one bit of information. Two or more wires pass ...
A tungsten carbide tipped (TCT) and high-speed steel (HSS) annular cutter (also known as a "core drill" or "hole saw"). An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal.
August — "IBM, TDK Partner In Magnetic Memory Research on Spin Transfer Torque Switching" IBM and TDK to lower the cost and boost performance of MRAM to hopefully release a product to market. [37] November — Toshiba applied and proved the spin-transfer torque switching with perpendicular magnetic anisotropy MTJ device. [38]
Core uses tiny magnetic ring cores, through which wires are threaded to write and read information. Each core represents one bit of information. The cores can be magnetized in two different ways (clockwise or counterclockwise), and the bit stored in a core is zero or one depending on that core's magnetization direction.
A magnetic drilling machine used for drilling perpendicular on a 100 mm thick workpiece of mild steel. A magnetic drilling machine is a portable drilling machine with a magnetic base (either electromagnetic or permanent magnet). It can use twist drill bits, annular cutters, milling cutters, and other rotary cutters. With suitable bits it can ...
Similar to magnetic-core memory, magnetic rings (or cores) are used to determine the data of the software. Unlike magnetic-core memory, the cores themselves are not used to store the data; the way a core is wired controls whether that core represents a '0' or a '1'. There are three main types of functions a wire can have in core rope memory: