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salzmann 3m reflektierende fahrradweste Salzmann Reflector Magnetic LED ClipThis highly visible LED clip on light is perfect for use by children on their way to school, adults commuting to work, runners and everyone who wants to stay safe whilst out and about. Made with 3M Scotchlite (Material origin: USA) 4 red LED lights with 2 light modes (flashing and static) Powered by a replaceable battery (CR2032) that is already included in the product
This highly visible LED clip-on light is perfect for use by children on their way to school, adults commuting to work, runners and everyone who wants to stay safe whilst out and about.
-Made with 3M Scotchlite (Material origin: USA)
-4 red LED lights with 2 light modes (flashing and static)
-Powered by a replaceable battery (CR2032) that is already included in the product
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4.1 ★★★★★
Based on 2304 reviews
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Product Reviews
★★★★★ 4
First programmer?
Format: Paperback
As an ardent reader of the past 1st edition, I was fairly excited to get the latest version. That is, until I encountered the history chapter of the new edition.
For one thing, what I do NOT understand in this second edition is the newly added description of August Ada Byron (countless of Lovelace). The author claims it was Babbage who was the first programmer to design the engines, not Ada. I am not trying to start a futile argument here about who has more or fewer contributions, etc.
What I am trying to assert here is that it is undisputed that Ada (unless the new evidence arises) left *the very first demonstration* of what this seemingly imaginary machine, which didn't even physically exist, was capable of through her program. Because Babbage designed the engine itself, that doesn't automatically put him in the position of a programmer (despite Babbage being a brilliant engineer/scientist and may have had a simple or detailed program in his mind). However, it was Ada who gave a definite touch to programming concepts that ultimately led to modern-day programming. Ada deserves more recognition than a mere "tutorial writer," and she is certainly entitled to the title she deserves.
Other than that, like the previous edition, this book is a must-read for people who are from related/unrelated fields. I always loved the 1st edition, and I would do too with the 2nd. Still, I think history should always be approached with more care, particularly if matters have potential controversies.
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Reviewed in the United States on January 6, 2023
★★★★★ 5
One of the few books worth your time
Format: Paperback
If you want to learn computers, start here. Learning from a historical perspective removes complexity of trying to start with say GPUs - you learn just like computer engineers did, incrementally.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
An absolutely brilliant book
Format: Paperback
This is an amazing book for the right kind of reader. It's a lot like Euclid's Elements but for computers as it leads the reader through designing a computer from first principles and builds to the point of creating software and adding peripherals. It's an amazingly clear but slightly challenging read. I have given this book as a gift many many times. It's an absolute classic in my opinion.
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Reviewed in the United States on March 19, 2025
★★★★★ 5
Great introduction to Godot 4
Format: Kindle
I've been writing various types of software for 10 years and was interested in learning Godot for 2D games. This book turned out to be informative and easy to follow and gave me the knowledge I was seeking. I learn best by example, and this project focused book was excellent in that regard.
If you have zero programming experience, I would recommend learning something like Python before diving into this book. The book teaches with GDScript, which is Godot's Python-like programming language.
There are some minor mistakes in the book, but an errata is currently being kept up-to-date on the github repository for the book. I opened a few issues for things I discovered, and the author added those things to the errata. Keep this in mind if you end up getting stuck on something and are 100% sure you followed the directions in the book.
I use Unreal for 3D games, so I have not yet gone through the chapters of this book for 3D games. I wouldn't expect a drastic drop in quality, but for the purposes of this review I can't give any insight on the 3D chapters.
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Reviewed in the United States on November 6, 2023
★★★★★ 5
Use boxes
Format: Paperback
Love the start of this too but will not tell you how to import projects use boxes on the side of your pc
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Reviewed in the United States on December 9, 2025
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