In the 1950s and 1960s before integrated circuits were used, memory was made
A) by creating a standing wave on a tightened electrical wire
B) by using a single transistor
C) by stringing tiny magnetic "donuts" onto a grid of wire threads
D) by a process of printing bits, similar to film photography

Question

Quizplus · Accepted Answer

In the 1950s and 1960s, before the widespread use of integrated circuits, one of the primary methods for creating computer memory was by using tiny magnetic rings known as "core memory." These magnetic "donuts" were strung onto a grid of wire threads, and each donut could store one bit of information by being magnetized in one of two directions. This method was widely used until it was eventually supplanted by semiconductor memory technologies.

In the 1950s and 1960s Before Integrated Circuits Were Used