Universal Serial Bus (USB) is an industry standard, developed by USB Implementers Forum (USB-IF), for digital data transmission and power delivery between many types of electronics. Discover the differences between USB connector types—USB-A, USB-B, USB-C, Mini-USB, and Micro-USB. This comprehensive guide explains their uses, compatibility, and how to identify each type. Learn everything about USB (Universal Serial Bus), its connection types, device compatibility, data transfer speeds, and how USB technology continues to evolve. Registration for the USB-IF Compliance Workshop which will be held August 4-7, 2026 in Portland, Oregon is open. Universal Serial Bus (USB) connects more than computers and peripherals. It has the power to connect you with a whole new world of device experiences. Shop a wide selection of USB Flash Drives at Amazon.com. Free shipping and free returns on eligible items. For related background details, please refer to our report on hampton bay ceiling fan wiring guide. USB is an industry standard for cables and connectors. Like any technology, it has progressed over time and had various iterations with significant speed and power improvements. The first version was released in 1996, and the most recent speed upgrade is USB4 version 2.0, released in 2022. USB was designed to standardize the connection of peripherals like pointing devices, keyboards, digital images and video cameras. But some devices such as printers, portable media players, disk drives, and network adaptors to personal computers used USB to communicate and to supply electric power. USB has always included some capability of providing power to peripheral devices, but the amount of power that can be given has increased over time. The modern specifications are called USB Power Delivery (USB-PD) and allow up to 240 watts.

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