SKU: 25082846624

Code : The Hidden Language of Computer Hardware and Software

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Description

Code : The Hidden Language of Computer Hardware and SoftwareThe 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

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 UnitChapter 22:� Registers and BussesChapter 23:� CPU Control SignalsChapter 24:� Jumps, Loops, and CallsChapter 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.

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SKU: 25082846624

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4.7 ★★★★★
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Gianni Breck
Chelsea, US
★★★★★ 5
Great Xylitol Chewing Gum!
Flavor Name: Spearmint, Size: 55 Count (Pack of 3), Flavor Name: Spearmint, Size: 55 Count (Pack of 3)
This review is for PUR Gum | Aspartame Free Chewing Gum | 100% Xylitol | Natural Spearmint Flavored Gum, 55 Pieces (Pack of 3). I got 2 of the 3-pack at the time because it was cheaper to do so than to get a 6-pack. Of course, the next day the 6-pack was cheaper lol. Anyway, this is great xylitol gum and not overly expensive like Zellie’s. I take 2 (which is one serving meaning 2g of xylitol) after “most” meals because it’s supposed to be good for my oral health. I chew one piece at a time for a couple minutes to prolong the sweet flavor instead of popping both into my mouth together. I like chewing these because they don’t harden up like some gums do. They stay soft throughout and I often forget and chew them for 15-20 minutes at a time. Anyway, I did the math and compared the PUR gum to other 100% xylitol gums out there and this one was a clear winner to me for the same benefits. I would totally recommend this gum and I like that it’s aspartame free! I’d give it a 5.0/5.0 - 03/20/2026.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2026
A
Verified Purchase
Asha77
Dallas, US
★★★★★ 3
Great taste but cannot use
Flavor Name: Spearmint, Size: 55 Count (Pack of 1)
First time trying for dental care. Really enjoy the taste only drawback taste doesn’t last long. However, it’s better than other sugar substitutes which my stomach does not like. Glad I signed up for the three pack sub. Great product! Recommend. May 16, 2026 Update: Unfortunately I cannot use this product after the initial trial every time I chew on these i experience stomach issues so the three pack I purchased will need to find someone that can use them or throw out.
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Reviewed in the United States on May 6, 2026
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Verified Purchase
OpinBook
Phoenix, US
★★★★★ 5
Powerful lasting peppermint flavor & the xylitol fights plaque!
Flavor Name: Spearmint, Size: 55 Count (Pack of 6)
The gum has a powerful peppermint taste – very refreshing. The flavor lasts a long time. The main reason that I bought this gum is because it has 100% xylitol. Xylitol helps fight plaque buildup. I have only had the product one day, so I can't say that it works, but I read many reports before I bought the gum that xylitol is excellent for fighting plaque buildup. It also has no sugar. It's vegan and it has only five calories per two pieces. I have so far only chewed one piece at a time. One piece seems plenty for me. I've read that people need from six to ten grams of xylitol per day to effectively fight plaque. So, this gum needs to be chewed accordingly. Many people chew after every time they eat. I am happy with this purchase.
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Reviewed in the United States on May 12, 2026
J
Verified Purchase
James & Gabrielle
Chelsea, US
★★★★★ 5
Great Gum to Help with Health Journey
Flavor Name: Spearmint, Size: 55 Count (Pack of 1)
This PUR Spearmint gum gets five stars from me. The spearmint flavor is really good and refreshing, but the only downside is the flavor doesn’t last super long compared to regular gum. Still, I bought this more for the cleaner ingredients than anything else since it fits into my current health journey and I wanted something aspartame-free. The gum has a little outer shell coating on it, but it’s still soft and easy to chew. It’s not hard or weirdly crunchy or anything like that. The family-size bag is also nice because it’s easy to throw in your car, backpack, or wherever without taking up a ton of space. Plus the resealable zipper bag helps keep it fresh. If you’re trying to avoid a bunch of chemicals and want a cleaner chewing gum option, this is definitely worth trying. I’d buy it again.
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Reviewed in the United States on May 27, 2026
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Verified Purchase
Idin Javadi
West Palm Beach, US
★★★★★ 5
Good product
Flavor Name: Spearmint, Size: 55 Count (Pack of 1)
Very soft and chewy, sugar free and has good flavor. It does lose its flavor around 10 minutes in but that's how long its meant to be chewed for anyway.
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Reviewed in the United States on May 16, 2026

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