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Phone cards were once a bestseller. Today, most are worth only a few euros.

Millions of kilometers of fiber optic cables in the ocean ensure global communication. Here's how the system works.

The rise of the Grundig brand began in the 1950s with the "Heinzelmann" radio. But how is the company faring today?

Smart home technology predates Alexa. These analog devices laid the foundation for today's connected technology decades ago.

Microsoft had to shut down its AI chatbot Tay after just 16 hours. Why the experiment failed so spectacularly.

25 Years Ago, '24' Revolutionized TV With Real-Time Action and Split-Screen Thrills

Why does the hard drive on a Windows system use the letter C instead of A or 1? The answer dates back to the early days of the computer age.

Loot boxes are widespread in video games and are particularly concerning to child protection advocates. But are they actually illegal?

A tool for the small device Flipper Zero can manipulate digital price tags. But why is this even possible?

Kagi small web brings back the '90s internet and highlights content often overlooked by Google—how the alternative search engine works.

The Nintendo GameCube relied on affordable hardware and strong games—but that wasn't enough to compete against the PlayStation 2 and Xbox.

Gerhard Wenzel has been collecting historical calculators for nearly 50 years and now owns one of the largest collections in the world.

A KI expert accidentally discovers a massive vulnerability in vacuum robots, gaining access to 7,000 devices and their data.

C64 in the West, KC 85 in the East: Why the East German computer couldn't compete technically and economically.

Not everything from Microsoft has been a success. One software remains remembered as its greatest failure to this day.

The first computer worm was once named the Morris worm. TECHBOOK reveals the story behind its namesake.

Few people find cat content anything but cute or amusing. But why is that? TECHBOOK investigated.

Can the internet simply be shut down? TECHBOOK explains why this is technically and legally nearly impossible in Germany.

From Tesla Experiment to Smart TV: How the Remote Control Became Everyday—and Might Soon Disappear

SoftRAM95 Promised Double Memory–But the Software Was a Hoax. How the Fake Became a Million-Dollar Success.

The discount retailer Action offers a variety of products, including hardware and accessories. Who is behind the brand Battletron?

This overview presents the most valuable Pokémon cards with actual sale prices and helps you determine if there's a treasure in your collection.

Long before GPS and smartphones, Otmar Pilsak developed the first navigation system with EVA. A conversation about pioneering spirit and improvisation.

Who is actually behind Amazon, and how did the company come to be? TECHBOOK takes a look back at more than 30 years of Amazon's history.

Myspace was once one of the most well-known and frequently visited websites in the world. Today, only a few people are familiar with the social media platform.

A developer has disproved an assertion with an exciting project. She created an absurdly large PDF for it.

Mannesmann launched the D2 network in 1992 as a mobile communications pioneer in Germany. The beginning of a new era in communication.

Blaupunkt was long synonymous with quality products in Germany. Today, the name still exists, but only in brand licensing.

There are many songs in film and TV history that gained fame thanks to their moving images. Here are 15 unforgettable classics.