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Foundations

What Is a Computer?

Checkpoint: What a Computer Is

Checkpoint: The IPOS Cycle

Inside the Machine

Hardware: Input, Output, and the CPU

Checkpoint: The CPU's Parts

Checkpoint: Input vs. Output

Memory and Storage: Where Data Lives

Checkpoint: Volatile Memory

Checkpoint: Sizing It Up

Interactive: Build the Computer

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The foundations of computing: what a computer actually is, the hardware that makes it work (input, output, and the CPU), and how memory and storage hold your data.

Before you can master any computer, you need to know what it is and what's inside it. This module builds your foundation — the input-process-output cycle, the physical parts that do the work, and where your data actually lives.

How Computers Work: Hardware & Memory

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