What is At a fundamental level, computers use?

At a fundamental level, computers use simple on and off signals to do everything they do.

Imagine you have a toy light switch, when it's on, the light is bright; when it's off, it’s dark. That’s like what happens inside a computer! Every part of a computer, from the screen to the keyboard, uses tiny switches that are either on or off.

Inside a computer, there are millions of these tiny switches. Each switch is called a bit, and it can be 1 (like "on") or 0 (like "off"). When you type a letter or play a game, the computer uses groups of bits, like little messages made of on and off signals, to understand what you're doing.

If you think about it, even your favorite video games are just a bunch of 1s and 0s working together. It’s like having a group of friends who pass notes back and forth, each note is either "yes" or "no," and from that, they can tell whole stories!