What does USB stand for?

The correct interpretation of USB is "Universal Serial Bus." This term reflects the function of the USB standard, which is designed to enable communication between devices and the host controller, primarily in computers. The "Universal" aspect underscores its wide applicability across various types of devices, allowing for standardized connections and interoperability. The "Serial" part indicates that data is transmitted one bit at a time over a single channel, contrasting with parallel transmission where multiple bits are sent simultaneously. "Bus" denotes a communication system that transfers data between components, making USB a crucial technology for connecting peripherals like keyboards, mice, printers, and external storage devices to computers.

Understanding this terminology is essential in the IT field, as USB interfaces are ubiquitous across technology platforms. The other options do not accurately reflect the established terminology within the tech community, which reinforces why "Universal Serial Bus" is the correct definition.