Editing Magnetic-core memory (section)

====Core rope memory====
{{Main articles|Core rope memory}}
[[Core rope memory]] is a [[read-only memory]] (ROM) form of core memory. In this case, the cores, which had more linear magnetic materials, were simply used as [[transformer]]s; no information was actually stored magnetically within the individual cores. Each bit of the word had one core. Reading the contents of a given memory address generated a pulse of current in a wire corresponding to that address. Each address wire was threaded either through a core to signify a binary [1], or around the outside of that core, to signify a binary [0]. As expected, the cores were much larger physically than those of read-write core memory. This type of memory was exceptionally reliable. An example was the [[Apollo Guidance Computer]] used for the [[NASA]] Moon landings.