The classic guide to how computers work, updated with new chapters and interactive graphics "For me, Code was a revelation. It was the first book about programming that spoke to me. It started with a story, and it built up, layer by layer, analogy by analogy, until I understood not just the Code, but the System. Code is a book that is as much about Systems Thinking and abstractions as it is about code and programming. Code teaches us how many unseen layers there are between the computer systems that we as users look at every day and the magical silicon rocks that we infused with lightning and taught to think." - Scott Hanselman, Partner Program Director, Microsoft, and host of Hanselminutes Computers are everywhere, most obviously in our laptops and smartphones, but also our cars, televisions, microwave ovens, alarm clocks, robot vacuum cleaners, and other smart appliances. Have you ever wondered what goes on inside these devices to make our lives easier but occasionally more infuriating? For more than 20 years, readers have delighted in Charles Petzold's illuminating story of the secret inner life of computers, and now he has revised it for this new age of computing. Cleverly illustrated and easy to understand, this is the book that cracks the mystery. You'll discover what flashlights, black cats, seesaws, and the ride of Paul Revere can teach you about computing, and how human ingenuity and our compulsion to communicate have shaped every electronic device we use. This new expanded edition explores more deeply the bit-by-bit and gate-by-gate construction of the heart of every smart device, the central processing unit that combines the simplest of basic operations to perform the most complex of feats. Petzold's companion website, CodeHiddenLanguage.com, uses animated graphics of key circuits in the book to make computers even easier to comprehend. In addition to substantially revised and updated content, new chapters include: Chapter 18: Let's Build a Clock! Chapter 21: The Arithmetic Logic Unit Chapter 22: Registers and Busses Chapter 23: CPU Control Signals Chapter 24: Jumps, Loops, and Calls Chapter 28: The World Brain From the simple ticking of clocks to the worldwide hum of the internet, Code reveals the essence of the digital revolution.

When R. Neville Johnston was shot three times in 1977, he died. But he came back knowing some things he hadn't known before. That the universe is made of up of vibrations for one. And that some of the most meaningful vibrations are the words we use in everyday thought and speech. Obviously it behooves us to choose our words with care so we can create the life we want. Hidden Language Codes is a book about thought. Where we go in life is directly related to our mastery and command of our thoughts and our language. In evolving, we naturally change the way we think. A method of accelerating this process is to change the very words we think with. This book is the key to learning words that will improve our lives and giving up the ones that hold us back. Learn to use power words--words that serve us well--such as "acceptance," "faith," even "MacGyver," and the key power word, "love." Those words that do not serve us well include "greed," "blame," "hard," and the poster child for disempowerment/slave thinking "can't." Our language is full of unconscious triggers--the words we speak are making decisions for us, running us. As long as we continue to try, need, guess, want, whine, and victim our way through life, we sabotage our own goals and happiness. Never use these words again. Take charge of your thoughts and speech, and your life will follow suit.

Berloquins spellbinding look at codemaking through the ages will grab historyand cryptology buffs alike, as he looks at secret codes from ancient times tothe present.

This illustrated encyclopedia surveys the history and development of code-making and code-breaking in all areas of culture and society from hieroglyphs and runes to DNA, the Zodiac Killer, graffiti, and beyond.

Protect your diary from snooping siblings. Share your secrets with a BFF. Guard your texts from unwanted eyes. Create the lingua franca for your own fantastical secret world! Expert language creator David J. Peterson (inventor of languages for Game of Thrones, the Marvel Universe, and more) guides you as you create own secret languages, codes, ciphers, and hidden messages. From simple cyphers to entirely new alphabets, Create Your Own Secret Language will help you master the skills of secret communication, whether it’s written, drawn, or spoken. By the time your finished reading, you’ll be able to share messages memora vosak laz vos otihoe vosecchi! (“that no one will be able to understand!") Illustrations by Ryan Goldsberry

Perfect for word lovers and puzzlers, this comprehensive, illustrated volume includes Indian sign language, Morse code, Jefferson's cipher wheel and more, presented in an informative and historical manner.

Explains how different ciphers work, why they were invented, and how they were cracked, covering codes ranging from ancient Egyptian hieroglyphs and World War II's Enigma machines to the samurai code of honor.