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A USB (Universal Serial Bus) is a standard interface used to connect a wide range of devices to computers and other electronic systems. It allows for data transfer, charging, and powering devices. USB connectors come in various shapes and sizes, including Type-A, Type-B, Type-C, and micro-USB, with Type-C being the most recent and offering faster data transfer and reversible insertion. USB ports are commonly found on computers, smartphones, tablets, and many other gadgets, enabling easy and versatile connections. USB devices range from storage drives, keyboards, and mice to cameras and smartphones.