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How QR Codes Took Over the World This article explains what QR codes are, how they were invented, and why the world now depends on them for payments, menus, tickets, and daily life. The Problem That Started It All In the early 1990s, Japanese factories faced a growing problem. Traditional barcodes could no longer store enough information. Scanning was slow, errors were common, and production lines were suffering. A Radical Idea From a Car Parts Company Engineers at Denso Wave asked a simple question: What if information could be read both horizontally and vertically? This idea became the foundation of the QR code, short for Quick Response. Why QR Codes Have Those Three Squares The three large squares are not decoration. They allow instant recognition of position, angle, and scale. Even if the code is tilted, damaged, or partially hidden, it still works. The Hidden Superpower: Error Correction QR codes can recover data even if up to 30 percent is ...

How Smart Glasses Work | The Tiny Computer Sitting on Your Eyes How Smart Glasses Work The Tiny Computer Sitting on Your Eyes Imagine wearing a computer on your face. Not in your pocket. Not in your hand. Right on your eyes. That is what smart glasses really are. A tiny spaceship disguised as eyewear. What Are Smart Glasses? Smart glasses are wearable devices that combine a display, camera, sensors, speakers, and AI inside something that looks like normal glasses. They let you see both the real world and digital information at the same time. The Core Idea: Augmented Reality (AR) Unlike VR headsets that replace reality, smart glasses add layers to reality. Digital information floats on top of your world. Directions, messages, translations, notifications. All without looking down at a phone. Where Does the Image Come From? Inside the frame, a micro-display projects tiny light beams. These beams bounce through a special lens or waveguid...