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From Amps to Apps: How Computers Work is an approachable, hands-on guide to understanding how computers work, from low-level circuits to modern software.From Amps to Apps: How Computers Work takes an informal approach to topics often reserved for textbooks. Each chapter covers one foundational aspect of computing. Exercises and hands-on activities throughout are designed to help the reader learn. Exercises mostly involve mental problem solving, while hands-on activities require the reader to actually try various aspects of computing: building a circuit, writing software, and so forth. Readers will learn about electrical circuits, learn how to read a circuit diagram, and build a working circuit. They'll learn how computer hardware like processors, memory, and input/output work and fit together; how low-level machine code runs on a processor, and how to examine the machine code of software running on a computer.