How does RAM work?

it is similar in concept to a set of boxes in which each box can hold a 0 or a 1.

To find a specific cell, the controller sends the column and row address down a thin electrical line etched into the chip. Each row and column in a array has its own address line. Any data that’s read flows back on a separate data line.

it is physically small and stored in microchips. It’s also small in terms of the amount of data it can hold. A typical laptop computer may come with 8 gigabytes of RAM, while a hard disk can hold 10 terabytes.