USBはなぜ形が統一されないのか

Have you ever opened a drawer and found 5 or 6 USB cables with different shapes? Why are there so many types despite the name "Universal"? Actually, this isn't a design flaw. From the reasons behind the different shapes of Type-A and Type-B, to the disappearance of Mini-USB, and the revolutionary USB-C finally achieved after 30 years—unraveling the history of connectors reveals a series of engineering trade-offs. ▼ Table of Contents (Timestamps) 00:00 Opening 00:30 The Pre-USB World—The Port Confusion of the 1990s 02:06 Why are Type-A and Type-B Different Shapes? 04:32 The Arrival of USB-C 8:46 Summary ▼ References and Primary Sources The content of this video is based on the following official documents and technical literature. [Official Specifications and Organizations] • USB Implementers Forum (USB-IF). USB Specification for various versions (USB 1.0/2.0/3.0/3.2/USB4). https://www.usb.org/ • USB-IF. USB Type-C Specification. https://www.usb.org/ • European Commission (2022). Common Charger Directive (Directive 2022/2380). https://ec.europa.eu/ [Reference Articles and Explanations] • Wikipedia. Articles on "USB", "USB 3.0", "USB-C", "USB On-The-Go", and "PS/2 port" • HowToGeek. USB Type-A and Type-B Explained. • Tom's Hardware. USB 3.2 Naming Scheme Explained. • CNET. USB-C Cables: Not All Are Created Equal. • EDN. USB 3.0 SuperSpeed ​​Technical Overview. • StackExchange. Mini-USB Insertion Lifetime and Deprecation. --- 📘 About this channel This channel explains difficult topics in a fun and easy-to-understand way through conversations between Zundamon and Metan, based on primary information and research data. We value "easy to understand and approachable, but still telling the truth." #USB #USBTypeC #Technology #TechnicalExplanation #Connector