How Computers Work
⭐ MasteredA computer takes input, processes it and gives output. The CPU is its brain, and memory stores information.
The first computers filled entire rooms.
All about How Computers Work
A computer works by taking input, processing it and producing output. Input devices such as keyboards, mice and microphones send information in. The central processing unit (CPU) carries out the instructions, and output devices such as screens and speakers show the results.
Memory holds the information the computer is using at the moment, while storage keeps files even when the power is off. Everything a computer does is built from these simple steps, repeated millions of times each second.
A computer works in three steps: it takes in information, processes it and then gives out a result. The computer changes that information using its processor, and output devices such as a screen or speaker show the result.
The processor, or CPU, is the brain that carries out instructions very quickly. Every app you use is just a set of instructions that the processor follows one step at a time.
🎮 Try it yourself!
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👀 What the animation shows
This animation shows information flowing into a computer, being processed and then coming out as a result. Watch the data move from input to the processor and memory, and then out to the screen.
Real-life uses of How Computers Work
- Writing documents and creating pictures
- Playing games with fast processing and graphics
- Storing photos, music and homework safely
Frequently asked questions about How Computers Work
What is the CPU?
The central processing unit, often called the brain of the computer, which carries out instructions.
What is the difference between RAM and storage?
RAM is short-term memory that is cleared when the computer is turned off. Storage keeps files permanently, like a hard drive or solid-state drive.
Why does a computer need electricity?
Its circuits use electrical signals to represent and process information.