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USB - Wikipedia
USB Explained: All the Different Types (and What They're Used for)
USB (Universal Serial Bus): Everything You Need to Know - Lifewire
USB hardware - Wikipedia
Front Page | USB-IF
USB Decoded: All the Specs and Version Numbers - Tom's Hardware
Understanding USB Cable Types and Which One to Use - MUO
USB speeds, types and features explained - Tech Advisor
What is a USB Port and How Can You Use It? - Lifewire
USB 3.0 - Wikipedia