USB Universal Serial Bus
The universal standard for computer ports — power, data, video, audio through the same connector.
Versions: USB 2.0 (480 Mbps), USB 3.x (5-20 Gbps), USB4 (40 Gbps). Connectors: A (classic), B (printers), Micro-B (old phones), C (modern, reversible, everything). Power Delivery up to 240W (laptop charging).