core memory is a type of early computer memory technology that used tiny magnetic rings called cores to store information. It was a form of random-access memory (RAM) used in early computers during the 1950s and 1960s. By using magnetic charges to represent bits of data, the computer could read and write information to and from the core memory. Core memory was eventually replaced by faster and more efficient types of memory, but it played a crucial role in the early development of computing.